Home | History | Annotate | Download | only in imsphone
      1 /*
      2  * Copyright (C) 2013 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package com.android.internal.telephony.imsphone;
     18 
     19 import android.app.ActivityManagerNative;
     20 import android.content.Context;
     21 import android.content.Intent;
     22 import android.os.AsyncResult;
     23 import android.os.Handler;
     24 import android.os.Message;
     25 import android.os.PowerManager;
     26 import android.os.Registrant;
     27 import android.os.RegistrantList;
     28 import android.os.PowerManager.WakeLock;
     29 import android.os.SystemProperties;
     30 import android.os.UserHandle;
     31 
     32 import android.telephony.PhoneNumberUtils;
     33 import android.telephony.ServiceState;
     34 import android.telephony.Rlog;
     35 import android.telephony.SubscriptionManager;
     36 import android.text.TextUtils;
     37 
     38 import com.android.ims.ImsCallForwardInfo;
     39 import com.android.ims.ImsCallProfile;
     40 import com.android.ims.ImsEcbm;
     41 import com.android.ims.ImsEcbmStateListener;
     42 import com.android.ims.ImsException;
     43 import com.android.ims.ImsReasonInfo;
     44 import com.android.ims.ImsSsInfo;
     45 import com.android.ims.ImsUtInterface;
     46 
     47 import static com.android.internal.telephony.CommandsInterface.CB_FACILITY_BAOC;
     48 import static com.android.internal.telephony.CommandsInterface.CB_FACILITY_BAOIC;
     49 import static com.android.internal.telephony.CommandsInterface.CB_FACILITY_BAOICxH;
     50 import static com.android.internal.telephony.CommandsInterface.CB_FACILITY_BAIC;
     51 import static com.android.internal.telephony.CommandsInterface.CB_FACILITY_BAICr;
     52 import static com.android.internal.telephony.CommandsInterface.CB_FACILITY_BA_ALL;
     53 import static com.android.internal.telephony.CommandsInterface.CB_FACILITY_BA_MO;
     54 import static com.android.internal.telephony.CommandsInterface.CB_FACILITY_BA_MT;
     55 
     56 import static com.android.internal.telephony.CommandsInterface.CF_ACTION_DISABLE;
     57 import static com.android.internal.telephony.CommandsInterface.CF_ACTION_ENABLE;
     58 import static com.android.internal.telephony.CommandsInterface.CF_ACTION_ERASURE;
     59 import static com.android.internal.telephony.CommandsInterface.CF_ACTION_REGISTRATION;
     60 import static com.android.internal.telephony.CommandsInterface.CF_REASON_ALL;
     61 import static com.android.internal.telephony.CommandsInterface.CF_REASON_ALL_CONDITIONAL;
     62 import static com.android.internal.telephony.CommandsInterface.CF_REASON_NO_REPLY;
     63 import static com.android.internal.telephony.CommandsInterface.CF_REASON_NOT_REACHABLE;
     64 import static com.android.internal.telephony.CommandsInterface.CF_REASON_BUSY;
     65 import static com.android.internal.telephony.CommandsInterface.CF_REASON_UNCONDITIONAL;
     66 import static com.android.internal.telephony.CommandsInterface.SERVICE_CLASS_VOICE;
     67 import static com.android.internal.telephony.CommandsInterface.SERVICE_CLASS_NONE;
     68 
     69 import com.android.internal.telephony.Call;
     70 import com.android.internal.telephony.CallForwardInfo;
     71 import com.android.internal.telephony.CallStateException;
     72 import com.android.internal.telephony.CallTracker;
     73 import com.android.internal.telephony.CommandException;
     74 import com.android.internal.telephony.CommandsInterface;
     75 import com.android.internal.telephony.Connection;
     76 import com.android.internal.telephony.Phone;
     77 import com.android.internal.telephony.PhoneBase;
     78 import com.android.internal.telephony.PhoneConstants;
     79 import com.android.internal.telephony.PhoneNotifier;
     80 import com.android.internal.telephony.Subscription;
     81 import com.android.internal.telephony.TelephonyIntents;
     82 import com.android.internal.telephony.TelephonyProperties;
     83 import com.android.internal.telephony.cdma.CDMAPhone;
     84 import com.android.internal.telephony.gsm.GSMPhone;
     85 import com.android.internal.telephony.uicc.IccRecords;
     86 
     87 import java.util.ArrayList;
     88 import java.util.List;
     89 
     90 /**
     91  * {@hide}
     92  */
     93 public class ImsPhone extends ImsPhoneBase {
     94     private static final String LOG_TAG = "ImsPhone";
     95     private static final boolean DBG = true;
     96     private static final boolean VDBG = false; // STOPSHIP if true
     97 
     98     protected static final int EVENT_SET_CALL_BARRING_DONE          = EVENT_LAST + 1;
     99     protected static final int EVENT_GET_CALL_BARRING_DONE          = EVENT_LAST + 2;
    100     protected static final int EVENT_SET_CALL_WAITING_DONE          = EVENT_LAST + 3;
    101     protected static final int EVENT_GET_CALL_WAITING_DONE          = EVENT_LAST + 4;
    102 
    103     public static final String CS_FALLBACK = "cs_fallback";
    104 
    105     static final int RESTART_ECM_TIMER = 0; // restart Ecm timer
    106     static final int CANCEL_ECM_TIMER = 1; // cancel Ecm timer
    107 
    108     // Default Emergency Callback Mode exit timer
    109     private static final int DEFAULT_ECM_EXIT_TIMER_VALUE = 300000;
    110 
    111     // Instance Variables
    112     PhoneBase mDefaultPhone;
    113     ImsPhoneCallTracker mCT;
    114     ArrayList <ImsPhoneMmiCode> mPendingMMIs = new ArrayList<ImsPhoneMmiCode>();
    115 
    116     Registrant mPostDialHandler;
    117     ServiceState mSS = new ServiceState();
    118 
    119     // To redial silently through GSM or CDMA when dialing through IMS fails
    120     private String mLastDialString;
    121 
    122     WakeLock mWakeLock;
    123     protected boolean mIsPhoneInEcmState;
    124 
    125     // mEcmExitRespRegistrant is informed after the phone has been exited the emergency
    126     // callback mode keep track of if phone is in emergency callback mode
    127     private Registrant mEcmExitRespRegistrant;
    128 
    129     private final RegistrantList mSilentRedialRegistrants = new RegistrantList();
    130 
    131     // A runnable which is used to automatically exit from Ecm after a period of time.
    132     private Runnable mExitEcmRunnable = new Runnable() {
    133         @Override
    134         public void run() {
    135             exitEmergencyCallbackMode();
    136         }
    137     };
    138 
    139     // Create Cf (Call forward) so that dialling number &
    140     // mIsCfu (true if reason is call forward unconditional)
    141     // mOnComplete (Message object passed by client) can be packed &
    142     // given as a single Cf object as user data to UtInterface.
    143     private static class Cf {
    144         final String mSetCfNumber;
    145         final Message mOnComplete;
    146         final boolean mIsCfu;
    147 
    148         Cf(String cfNumber, boolean isCfu, Message onComplete) {
    149             mSetCfNumber = cfNumber;
    150             mIsCfu = isCfu;
    151             mOnComplete = onComplete;
    152         }
    153     }
    154 
    155     // Constructors
    156 
    157     ImsPhone(Context context, PhoneNotifier notifier, Phone defaultPhone) {
    158         super("ImsPhone", context, notifier);
    159 
    160         mDefaultPhone = (PhoneBase) defaultPhone;
    161         mCT = new ImsPhoneCallTracker(this);
    162         mSS.setStateOff();
    163 
    164         mPhoneId = mDefaultPhone.getPhoneId();
    165 
    166         // This is needed to handle phone process crashes
    167         // Same property is used for both CDMA & IMS phone.
    168         mIsPhoneInEcmState = SystemProperties.getBoolean(
    169                 TelephonyProperties.PROPERTY_INECM_MODE, false);
    170 
    171         PowerManager pm = (PowerManager) context.getSystemService(Context.POWER_SERVICE);
    172         mWakeLock = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, LOG_TAG);
    173         mWakeLock.setReferenceCounted(false);
    174     }
    175 
    176     public void updateParentPhone(PhoneBase parentPhone) {
    177         // synchronization is managed at the PhoneBase scope (which calls this function)
    178         mDefaultPhone = parentPhone;
    179         mPhoneId = mDefaultPhone.getPhoneId();
    180     }
    181 
    182     @Override
    183     public void dispose() {
    184         Rlog.d(LOG_TAG, "dispose");
    185         // Nothing to dispose in PhoneBase
    186         //super.dispose();
    187         mPendingMMIs.clear();
    188         mCT.dispose();
    189 
    190         //Force all referenced classes to unregister their former registered events
    191     }
    192 
    193     @Override
    194     public void removeReferences() {
    195         Rlog.d(LOG_TAG, "removeReferences");
    196         super.removeReferences();
    197 
    198         mCT = null;
    199         mSS = null;
    200     }
    201 
    202     @Override
    203     public ServiceState
    204     getServiceState() {
    205         return mSS;
    206     }
    207 
    208     /* package */ void setServiceState(int state) {
    209         mSS.setState(state);
    210     }
    211 
    212     @Override
    213     public CallTracker getCallTracker() {
    214         return mCT;
    215     }
    216 
    217     @Override
    218     public List<? extends ImsPhoneMmiCode>
    219     getPendingMmiCodes() {
    220         return mPendingMMIs;
    221     }
    222 
    223 
    224     @Override
    225     public void
    226     acceptCall(int videoState) throws CallStateException {
    227         mCT.acceptCall(videoState);
    228     }
    229 
    230     @Override
    231     public void
    232     rejectCall() throws CallStateException {
    233         mCT.rejectCall();
    234     }
    235 
    236     @Override
    237     public void
    238     switchHoldingAndActive() throws CallStateException {
    239         mCT.switchWaitingOrHoldingAndActive();
    240     }
    241 
    242     @Override
    243     public boolean canConference() {
    244         return mCT.canConference();
    245     }
    246 
    247     public boolean canDial() {
    248         return mCT.canDial();
    249     }
    250 
    251     @Override
    252     public void conference() {
    253         mCT.conference();
    254     }
    255 
    256     @Override
    257     public void clearDisconnected() {
    258         mCT.clearDisconnected();
    259     }
    260 
    261     @Override
    262     public boolean canTransfer() {
    263         return mCT.canTransfer();
    264     }
    265 
    266     @Override
    267     public void explicitCallTransfer() {
    268         mCT.explicitCallTransfer();
    269     }
    270 
    271     @Override
    272     public ImsPhoneCall
    273     getForegroundCall() {
    274         return mCT.mForegroundCall;
    275     }
    276 
    277     @Override
    278     public ImsPhoneCall
    279     getBackgroundCall() {
    280         return mCT.mBackgroundCall;
    281     }
    282 
    283     @Override
    284     public ImsPhoneCall
    285     getRingingCall() {
    286         return mCT.mRingingCall;
    287     }
    288 
    289     private boolean handleCallDeflectionIncallSupplementaryService(
    290             String dialString) {
    291         if (dialString.length() > 1) {
    292             return false;
    293         }
    294 
    295         if (getRingingCall().getState() != ImsPhoneCall.State.IDLE) {
    296             if (DBG) Rlog.d(LOG_TAG, "MmiCode 0: rejectCall");
    297             try {
    298                 mCT.rejectCall();
    299             } catch (CallStateException e) {
    300                 if (DBG) Rlog.d(LOG_TAG, "reject failed", e);
    301                 notifySuppServiceFailed(Phone.SuppService.REJECT);
    302             }
    303         } else if (getBackgroundCall().getState() != ImsPhoneCall.State.IDLE) {
    304             if (DBG) Rlog.d(LOG_TAG, "MmiCode 0: hangupWaitingOrBackground");
    305             try {
    306                 mCT.hangup(getBackgroundCall());
    307             } catch (CallStateException e) {
    308                 if (DBG) Rlog.d(LOG_TAG, "hangup failed", e);
    309             }
    310         }
    311 
    312         return true;
    313     }
    314 
    315 
    316     private boolean handleCallWaitingIncallSupplementaryService(
    317             String dialString) {
    318         int len = dialString.length();
    319 
    320         if (len > 2) {
    321             return false;
    322         }
    323 
    324         ImsPhoneCall call = getForegroundCall();
    325 
    326         try {
    327             if (len > 1) {
    328                 if (DBG) Rlog.d(LOG_TAG, "not support 1X SEND");
    329                 notifySuppServiceFailed(Phone.SuppService.HANGUP);
    330             } else {
    331                 if (call.getState() != ImsPhoneCall.State.IDLE) {
    332                     if (DBG) Rlog.d(LOG_TAG, "MmiCode 1: hangup foreground");
    333                     mCT.hangup(call);
    334                 } else {
    335                     if (DBG) Rlog.d(LOG_TAG, "MmiCode 1: switchWaitingOrHoldingAndActive");
    336                     mCT.switchWaitingOrHoldingAndActive();
    337                 }
    338             }
    339         } catch (CallStateException e) {
    340             if (DBG) Rlog.d(LOG_TAG, "hangup failed", e);
    341             notifySuppServiceFailed(Phone.SuppService.HANGUP);
    342         }
    343 
    344         return true;
    345     }
    346 
    347     private boolean handleCallHoldIncallSupplementaryService(String dialString) {
    348         int len = dialString.length();
    349 
    350         if (len > 2) {
    351             return false;
    352         }
    353 
    354         ImsPhoneCall call = getForegroundCall();
    355 
    356         if (len > 1) {
    357             if (DBG) Rlog.d(LOG_TAG, "separate not supported");
    358             notifySuppServiceFailed(Phone.SuppService.SEPARATE);
    359         } else {
    360             try {
    361                 if (getRingingCall().getState() != ImsPhoneCall.State.IDLE) {
    362                     if (DBG) Rlog.d(LOG_TAG, "MmiCode 2: accept ringing call");
    363                     mCT.acceptCall(ImsCallProfile.CALL_TYPE_VOICE);
    364                 } else {
    365                     if (DBG) Rlog.d(LOG_TAG, "MmiCode 2: switchWaitingOrHoldingAndActive");
    366                     mCT.switchWaitingOrHoldingAndActive();
    367                 }
    368             } catch (CallStateException e) {
    369                 if (DBG) Rlog.d(LOG_TAG, "switch failed", e);
    370                 notifySuppServiceFailed(Phone.SuppService.SWITCH);
    371             }
    372         }
    373 
    374         return true;
    375     }
    376 
    377     private boolean handleMultipartyIncallSupplementaryService(
    378             String dialString) {
    379         if (dialString.length() > 1) {
    380             return false;
    381         }
    382 
    383         if (DBG) Rlog.d(LOG_TAG, "MmiCode 3: merge calls");
    384         conference();
    385         return true;
    386     }
    387 
    388     private boolean handleEctIncallSupplementaryService(String dialString) {
    389 
    390         int len = dialString.length();
    391 
    392         if (len != 1) {
    393             return false;
    394         }
    395 
    396         if (DBG) Rlog.d(LOG_TAG, "MmiCode 4: not support explicit call transfer");
    397         notifySuppServiceFailed(Phone.SuppService.TRANSFER);
    398         return true;
    399     }
    400 
    401     private boolean handleCcbsIncallSupplementaryService(String dialString) {
    402         if (dialString.length() > 1) {
    403             return false;
    404         }
    405 
    406         Rlog.i(LOG_TAG, "MmiCode 5: CCBS not supported!");
    407         // Treat it as an "unknown" service.
    408         notifySuppServiceFailed(Phone.SuppService.UNKNOWN);
    409         return true;
    410     }
    411 
    412     @Override
    413     public boolean handleInCallMmiCommands(String dialString) {
    414         if (!isInCall()) {
    415             return false;
    416         }
    417 
    418         if (TextUtils.isEmpty(dialString)) {
    419             return false;
    420         }
    421 
    422         boolean result = false;
    423         char ch = dialString.charAt(0);
    424         switch (ch) {
    425             case '0':
    426                 result = handleCallDeflectionIncallSupplementaryService(
    427                         dialString);
    428                 break;
    429             case '1':
    430                 result = handleCallWaitingIncallSupplementaryService(
    431                         dialString);
    432                 break;
    433             case '2':
    434                 result = handleCallHoldIncallSupplementaryService(dialString);
    435                 break;
    436             case '3':
    437                 result = handleMultipartyIncallSupplementaryService(dialString);
    438                 break;
    439             case '4':
    440                 result = handleEctIncallSupplementaryService(dialString);
    441                 break;
    442             case '5':
    443                 result = handleCcbsIncallSupplementaryService(dialString);
    444                 break;
    445             default:
    446                 break;
    447         }
    448 
    449         return result;
    450     }
    451 
    452     boolean isInCall() {
    453         ImsPhoneCall.State foregroundCallState = getForegroundCall().getState();
    454         ImsPhoneCall.State backgroundCallState = getBackgroundCall().getState();
    455         ImsPhoneCall.State ringingCallState = getRingingCall().getState();
    456 
    457        return (foregroundCallState.isAlive() ||
    458                backgroundCallState.isAlive() ||
    459                ringingCallState.isAlive());
    460     }
    461 
    462     void notifyNewRingingConnection(Connection c) {
    463         mDefaultPhone.notifyNewRingingConnectionP(c);
    464     }
    465 
    466 
    467     @Override
    468     public Connection
    469     dial(String dialString, int videoState) throws CallStateException {
    470         return dialInternal(dialString, videoState);
    471     }
    472 
    473     protected Connection dialInternal(String dialString, int videoState)
    474             throws CallStateException {
    475         // Need to make sure dialString gets parsed properly
    476         String newDialString = PhoneNumberUtils.stripSeparators(dialString);
    477 
    478         // handle in-call MMI first if applicable
    479         if (handleInCallMmiCommands(newDialString)) {
    480             return null;
    481         }
    482 
    483         if (mDefaultPhone.getPhoneType() == PhoneConstants.PHONE_TYPE_CDMA) {
    484             return mCT.dial(dialString, videoState);
    485         }
    486 
    487         // Only look at the Network portion for mmi
    488         String networkPortion = PhoneNumberUtils.extractNetworkPortionAlt(newDialString);
    489         ImsPhoneMmiCode mmi =
    490                 ImsPhoneMmiCode.newFromDialString(networkPortion, this);
    491         if (DBG) Rlog.d(LOG_TAG,
    492                 "dialing w/ mmi '" + mmi + "'...");
    493 
    494         if (mmi == null) {
    495             return mCT.dial(dialString, videoState);
    496         } else if (mmi.isTemporaryModeCLIR()) {
    497             return mCT.dial(mmi.getDialingNumber(), mmi.getCLIRMode(), videoState);
    498         } else if (!mmi.isSupportedOverImsPhone()) {
    499             // If the mmi is not supported by IMS service,
    500             // try to initiate dialing with default phone
    501             throw new CallStateException(CS_FALLBACK);
    502         } else {
    503             mPendingMMIs.add(mmi);
    504             mMmiRegistrants.notifyRegistrants(new AsyncResult(null, mmi, null));
    505             mmi.processCode();
    506 
    507             return null;
    508         }
    509     }
    510 
    511     @Override
    512     public void
    513     sendDtmf(char c) {
    514         if (!PhoneNumberUtils.is12Key(c)) {
    515             Rlog.e(LOG_TAG,
    516                     "sendDtmf called with invalid character '" + c + "'");
    517         } else {
    518             if (mCT.mState ==  PhoneConstants.State.OFFHOOK) {
    519                 mCT.sendDtmf(c);
    520             }
    521         }
    522     }
    523 
    524     @Override
    525     public void
    526     startDtmf(char c) {
    527         if (!PhoneNumberUtils.is12Key(c)) {
    528             Rlog.e(LOG_TAG,
    529                     "startDtmf called with invalid character '" + c + "'");
    530         } else {
    531             sendDtmf(c);
    532         }
    533     }
    534 
    535     @Override
    536     public void
    537     stopDtmf() {
    538         // no op
    539     }
    540 
    541     @Override
    542     public void setOnPostDialCharacter(Handler h, int what, Object obj) {
    543         mPostDialHandler = new Registrant(h, what, obj);
    544     }
    545 
    546     /*package*/ void notifyIncomingRing() {
    547         if (DBG) Rlog.d(LOG_TAG, "notifyIncomingRing");
    548         AsyncResult ar = new AsyncResult(null, null, null);
    549         sendMessage(obtainMessage(EVENT_CALL_RING, ar));
    550     }
    551 
    552     @Override
    553     public void setMute(boolean muted) {
    554         mCT.setMute(muted);
    555     }
    556 
    557     @Override
    558     public boolean getMute() {
    559         return mCT.getMute();
    560     }
    561 
    562     @Override
    563     public PhoneConstants.State getState() {
    564         return mCT.mState;
    565     }
    566 
    567     private boolean isValidCommandInterfaceCFReason (int commandInterfaceCFReason) {
    568         switch (commandInterfaceCFReason) {
    569         case CF_REASON_UNCONDITIONAL:
    570         case CF_REASON_BUSY:
    571         case CF_REASON_NO_REPLY:
    572         case CF_REASON_NOT_REACHABLE:
    573         case CF_REASON_ALL:
    574         case CF_REASON_ALL_CONDITIONAL:
    575             return true;
    576         default:
    577             return false;
    578         }
    579     }
    580 
    581     private boolean isValidCommandInterfaceCFAction (int commandInterfaceCFAction) {
    582         switch (commandInterfaceCFAction) {
    583         case CF_ACTION_DISABLE:
    584         case CF_ACTION_ENABLE:
    585         case CF_ACTION_REGISTRATION:
    586         case CF_ACTION_ERASURE:
    587             return true;
    588         default:
    589             return false;
    590         }
    591     }
    592 
    593     private  boolean isCfEnable(int action) {
    594         return (action == CF_ACTION_ENABLE) || (action == CF_ACTION_REGISTRATION);
    595     }
    596 
    597     private int getConditionFromCFReason(int reason) {
    598         switch(reason) {
    599             case CF_REASON_UNCONDITIONAL: return ImsUtInterface.CDIV_CF_UNCONDITIONAL;
    600             case CF_REASON_BUSY: return ImsUtInterface.CDIV_CF_BUSY;
    601             case CF_REASON_NO_REPLY: return ImsUtInterface.CDIV_CF_NO_REPLY;
    602             case CF_REASON_NOT_REACHABLE: return ImsUtInterface.CDIV_CF_NOT_REACHABLE;
    603             default:
    604                 break;
    605         }
    606 
    607         return ImsUtInterface.INVALID;
    608     }
    609 
    610     private int getCFReasonFromCondition(int condition) {
    611         switch(condition) {
    612             case ImsUtInterface.CDIV_CF_UNCONDITIONAL: return CF_REASON_UNCONDITIONAL;
    613             case ImsUtInterface.CDIV_CF_BUSY: return CF_REASON_BUSY;
    614             case ImsUtInterface.CDIV_CF_NO_REPLY: return CF_REASON_NO_REPLY;
    615             case ImsUtInterface.CDIV_CF_NOT_REACHABLE: return CF_REASON_NOT_REACHABLE;
    616             default:
    617                 break;
    618         }
    619 
    620         return CF_REASON_NOT_REACHABLE;
    621     }
    622 
    623     private int getActionFromCFAction(int action) {
    624         switch(action) {
    625             case CF_ACTION_DISABLE: return ImsUtInterface.ACTION_DEACTIVATION;
    626             case CF_ACTION_ENABLE: return ImsUtInterface.ACTION_ACTIVATION;
    627             case CF_ACTION_ERASURE: return ImsUtInterface.ACTION_ERASURE;
    628             case CF_ACTION_REGISTRATION: return ImsUtInterface.ACTION_REGISTRATION;
    629             default:
    630                 break;
    631         }
    632 
    633         return ImsUtInterface.INVALID;
    634     }
    635 
    636     @Override
    637     public void getCallForwardingOption(int commandInterfaceCFReason,
    638             Message onComplete) {
    639         if (DBG) Rlog.d(LOG_TAG, "getCallForwardingOption reason=" + commandInterfaceCFReason);
    640         if (isValidCommandInterfaceCFReason(commandInterfaceCFReason)) {
    641             if (DBG) Rlog.d(LOG_TAG, "requesting call forwarding query.");
    642             Message resp;
    643             resp = obtainMessage(EVENT_GET_CALL_FORWARD_DONE, onComplete);
    644 
    645             try {
    646                 ImsUtInterface ut = mCT.getUtInterface();
    647                 ut.queryCallForward(getConditionFromCFReason(commandInterfaceCFReason),null,resp);
    648             } catch (ImsException e) {
    649                 sendErrorResponse(onComplete, e);
    650             }
    651         } else if (onComplete != null) {
    652             sendErrorResponse(onComplete);
    653         }
    654     }
    655 
    656     @Override
    657     public void setCallForwardingOption(int commandInterfaceCFAction,
    658             int commandInterfaceCFReason,
    659             String dialingNumber,
    660             int timerSeconds,
    661             Message onComplete) {
    662         if (DBG) Rlog.d(LOG_TAG, "setCallForwardingOption action=" + commandInterfaceCFAction
    663                 + ", reason=" + commandInterfaceCFReason);
    664         if ((isValidCommandInterfaceCFAction(commandInterfaceCFAction)) &&
    665                 (isValidCommandInterfaceCFReason(commandInterfaceCFReason))) {
    666             Message resp;
    667             Cf cf = new Cf(dialingNumber,
    668                     (commandInterfaceCFReason == CF_REASON_UNCONDITIONAL ? true : false),
    669                     onComplete);
    670             resp = obtainMessage(EVENT_SET_CALL_FORWARD_DONE,
    671                     isCfEnable(commandInterfaceCFAction) ? 1 : 0, 0, cf);
    672 
    673             try {
    674                 ImsUtInterface ut = mCT.getUtInterface();
    675                 ut.updateCallForward(getActionFromCFAction(commandInterfaceCFAction),
    676                         getConditionFromCFReason(commandInterfaceCFReason),
    677                         dialingNumber,
    678                         timerSeconds,
    679                         onComplete);
    680              } catch (ImsException e) {
    681                 sendErrorResponse(onComplete, e);
    682              }
    683         } else if (onComplete != null) {
    684             sendErrorResponse(onComplete);
    685         }
    686     }
    687 
    688     @Override
    689     public void getCallWaiting(Message onComplete) {
    690         if (DBG) Rlog.d(LOG_TAG, "getCallWaiting");
    691         Message resp;
    692         resp = obtainMessage(EVENT_GET_CALL_WAITING_DONE, onComplete);
    693 
    694         try {
    695             ImsUtInterface ut = mCT.getUtInterface();
    696             ut.queryCallWaiting(resp);
    697         } catch (ImsException e) {
    698             sendErrorResponse(onComplete, e);
    699         }
    700     }
    701 
    702     @Override
    703     public void setCallWaiting(boolean enable, Message onComplete) {
    704         if (DBG) Rlog.d(LOG_TAG, "setCallWaiting enable=" + enable);
    705         Message resp;
    706         resp = obtainMessage(EVENT_SET_CALL_WAITING_DONE, onComplete);
    707 
    708         try {
    709             ImsUtInterface ut = mCT.getUtInterface();
    710             ut.updateCallWaiting(enable, resp);
    711         } catch (ImsException e) {
    712             sendErrorResponse(onComplete, e);
    713         }
    714     }
    715 
    716     private int getCBTypeFromFacility(String facility) {
    717         if (CB_FACILITY_BAOC.equals(facility)) {
    718             return ImsUtInterface.CB_BAOC;
    719         } else if (CB_FACILITY_BAOIC.equals(facility)) {
    720             return ImsUtInterface.CB_BOIC;
    721         } else if (CB_FACILITY_BAOICxH.equals(facility)) {
    722             return ImsUtInterface.CB_BOIC_EXHC;
    723         } else if (CB_FACILITY_BAIC.equals(facility)) {
    724             return ImsUtInterface.CB_BAIC;
    725         } else if (CB_FACILITY_BAICr.equals(facility)) {
    726             return ImsUtInterface.CB_BIC_WR;
    727         } else if (CB_FACILITY_BA_ALL.equals(facility)) {
    728             return ImsUtInterface.CB_BA_ALL;
    729         } else if (CB_FACILITY_BA_MO.equals(facility)) {
    730             return ImsUtInterface.CB_BA_MO;
    731         } else if (CB_FACILITY_BA_MT.equals(facility)) {
    732             return ImsUtInterface.CB_BA_MT;
    733         }
    734 
    735         return 0;
    736     }
    737 
    738     /* package */
    739     void getCallBarring(String facility, Message onComplete) {
    740         if (DBG) Rlog.d(LOG_TAG, "getCallBarring facility=" + facility);
    741         Message resp;
    742         resp = obtainMessage(EVENT_GET_CALL_BARRING_DONE, onComplete);
    743 
    744         try {
    745             ImsUtInterface ut = mCT.getUtInterface();
    746             ut.queryCallBarring(getCBTypeFromFacility(facility), resp);
    747         } catch (ImsException e) {
    748             sendErrorResponse(onComplete, e);
    749         }
    750     }
    751 
    752     /* package */
    753     void setCallBarring(String facility, boolean lockState, String password, Message onComplete) {
    754         if (DBG) Rlog.d(LOG_TAG, "setCallBarring facility=" + facility
    755                 + ", lockState=" + lockState);
    756         Message resp;
    757         resp = obtainMessage(EVENT_SET_CALL_BARRING_DONE, onComplete);
    758 
    759         try {
    760             ImsUtInterface ut = mCT.getUtInterface();
    761             // password is not required with Ut interface
    762             ut.updateCallBarring(getCBTypeFromFacility(facility), lockState, resp, null);
    763         } catch (ImsException e) {
    764             sendErrorResponse(onComplete, e);
    765         }
    766     }
    767 
    768     @Override
    769     public void sendUssdResponse(String ussdMessge) {
    770         Rlog.d(LOG_TAG, "sendUssdResponse");
    771         ImsPhoneMmiCode mmi = ImsPhoneMmiCode.newFromUssdUserInput(ussdMessge, this);
    772         mPendingMMIs.add(mmi);
    773         mMmiRegistrants.notifyRegistrants(new AsyncResult(null, mmi, null));
    774         mmi.sendUssd(ussdMessge);
    775     }
    776 
    777     /* package */
    778     void sendUSSD (String ussdString, Message response) {
    779         mCT.sendUSSD(ussdString, response);
    780     }
    781 
    782     /* package */
    783     void cancelUSSD() {
    784         mCT.cancelUSSD();
    785     }
    786 
    787     /* package */
    788     void sendErrorResponse(Message onComplete) {
    789         Rlog.d(LOG_TAG, "sendErrorResponse");
    790         if (onComplete != null) {
    791             AsyncResult.forMessage(onComplete, null,
    792                     new CommandException(CommandException.Error.GENERIC_FAILURE));
    793             onComplete.sendToTarget();
    794         }
    795     }
    796 
    797     /* package */
    798     void sendErrorResponse(Message onComplete, Throwable e) {
    799         Rlog.d(LOG_TAG, "sendErrorResponse");
    800         if (onComplete != null) {
    801             AsyncResult.forMessage(onComplete, null, getCommandException(e));
    802             onComplete.sendToTarget();
    803         }
    804     }
    805 
    806     /* package */
    807     void sendErrorResponse(Message onComplete, ImsReasonInfo reasonInfo) {
    808         Rlog.d(LOG_TAG, "sendErrorResponse reasonCode=" + reasonInfo.getCode());
    809         if (onComplete != null) {
    810             AsyncResult.forMessage(onComplete, null, getCommandException(reasonInfo.getCode()));
    811             onComplete.sendToTarget();
    812         }
    813     }
    814 
    815     /* package */
    816     CommandException getCommandException(int code) {
    817         Rlog.d(LOG_TAG, "getCommandException code=" + code);
    818         CommandException.Error error = CommandException.Error.GENERIC_FAILURE;
    819 
    820         switch(code) {
    821             case ImsReasonInfo.CODE_UT_NOT_SUPPORTED:
    822                 error = CommandException.Error.REQUEST_NOT_SUPPORTED;
    823                 break;
    824             case ImsReasonInfo.CODE_UT_CB_PASSWORD_MISMATCH:
    825                 error = CommandException.Error.PASSWORD_INCORRECT;
    826                 break;
    827             default:
    828                 break;
    829         }
    830 
    831         return new CommandException(error);
    832     }
    833 
    834     /* package */
    835     CommandException getCommandException(Throwable e) {
    836         CommandException ex = null;
    837 
    838         if (e instanceof ImsException) {
    839             ex = getCommandException(((ImsException)e).getCode());
    840         } else {
    841             Rlog.d(LOG_TAG, "getCommandException generic failure");
    842             ex = new CommandException(CommandException.Error.GENERIC_FAILURE);
    843         }
    844         return ex;
    845     }
    846 
    847     private void
    848     onNetworkInitiatedUssd(ImsPhoneMmiCode mmi) {
    849         Rlog.d(LOG_TAG, "onNetworkInitiatedUssd");
    850         mMmiCompleteRegistrants.notifyRegistrants(
    851             new AsyncResult(null, mmi, null));
    852     }
    853 
    854     /* package */
    855     void onIncomingUSSD (int ussdMode, String ussdMessage) {
    856         if (DBG) Rlog.d(LOG_TAG, "onIncomingUSSD ussdMode=" + ussdMode);
    857 
    858         boolean isUssdError;
    859         boolean isUssdRequest;
    860 
    861         isUssdRequest
    862             = (ussdMode == CommandsInterface.USSD_MODE_REQUEST);
    863 
    864         isUssdError
    865             = (ussdMode != CommandsInterface.USSD_MODE_NOTIFY
    866                 && ussdMode != CommandsInterface.USSD_MODE_REQUEST);
    867 
    868         ImsPhoneMmiCode found = null;
    869         for (int i = 0, s = mPendingMMIs.size() ; i < s; i++) {
    870             if(mPendingMMIs.get(i).isPendingUSSD()) {
    871                 found = mPendingMMIs.get(i);
    872                 break;
    873             }
    874         }
    875 
    876         if (found != null) {
    877             // Complete pending USSD
    878             if (isUssdError) {
    879                 found.onUssdFinishedError();
    880             } else {
    881                 found.onUssdFinished(ussdMessage, isUssdRequest);
    882             }
    883         } else { // pending USSD not found
    884             // The network may initiate its own USSD request
    885 
    886             // ignore everything that isnt a Notify or a Request
    887             // also, discard if there is no message to present
    888             if (!isUssdError && ussdMessage != null) {
    889                 ImsPhoneMmiCode mmi;
    890                 mmi = ImsPhoneMmiCode.newNetworkInitiatedUssd(ussdMessage,
    891                         isUssdRequest,
    892                         ImsPhone.this);
    893                 onNetworkInitiatedUssd(mmi);
    894             }
    895         }
    896     }
    897 
    898     /**
    899      * Removes the given MMI from the pending list and notifies
    900      * registrants that it is complete.
    901      * @param mmi MMI that is done
    902      */
    903     /*package*/ void
    904     onMMIDone(ImsPhoneMmiCode mmi) {
    905         /* Only notify complete if it's on the pending list.
    906          * Otherwise, it's already been handled (eg, previously canceled).
    907          * The exception is cancellation of an incoming USSD-REQUEST, which is
    908          * not on the list.
    909          */
    910         if (mPendingMMIs.remove(mmi) || mmi.isUssdRequest()) {
    911             mMmiCompleteRegistrants.notifyRegistrants(
    912                     new AsyncResult(null, mmi, null));
    913         }
    914     }
    915 
    916     public ImsPhoneConnection getHandoverConnection() {
    917         // handover for single foreground call
    918         ImsPhoneConnection conn = getForegroundCall().getHandoverConnection();
    919 
    920         // handover for single background call
    921         if (conn == null) {
    922             conn = getBackgroundCall().getHandoverConnection();
    923         }
    924 
    925         // handover for single ringing call
    926         if (conn == null) {
    927             conn = getRingingCall().getHandoverConnection();
    928         }
    929 
    930         return conn;
    931     }
    932 
    933     public void notifySrvccState(Call.SrvccState state) {
    934         mCT.notifySrvccState(state);
    935     }
    936 
    937     /* package */ void
    938     initiateSilentRedial() {
    939         String result = mLastDialString;
    940         AsyncResult ar = new AsyncResult(null, result, null);
    941         if (ar != null) {
    942             mSilentRedialRegistrants.notifyRegistrants(ar);
    943         }
    944     }
    945 
    946     public void registerForSilentRedial(Handler h, int what, Object obj) {
    947         mSilentRedialRegistrants.addUnique(h, what, obj);
    948     }
    949 
    950     public void unregisterForSilentRedial(Handler h) {
    951         mSilentRedialRegistrants.remove(h);
    952     }
    953 
    954     @Override
    955     public long getSubId() {
    956         return mDefaultPhone.getSubId();
    957     }
    958 
    959     @Override
    960     public int getPhoneId() {
    961         return mDefaultPhone.getPhoneId();
    962     }
    963 
    964     @Override
    965     public Subscription getSubscriptionInfo() {
    966         return mDefaultPhone.getSubscriptionInfo();
    967     }
    968 
    969     private IccRecords getIccRecords() {
    970         return mDefaultPhone.mIccRecords.get();
    971     }
    972 
    973     private CallForwardInfo getCallForwardInfo(ImsCallForwardInfo info) {
    974         CallForwardInfo cfInfo = new CallForwardInfo();
    975         cfInfo.status = info.mStatus;
    976         cfInfo.reason = getCFReasonFromCondition(info.mCondition);
    977         cfInfo.serviceClass = SERVICE_CLASS_VOICE;
    978         cfInfo.toa = info.mToA;
    979         cfInfo.number = info.mNumber;
    980         cfInfo.timeSeconds = info.mTimeSeconds;
    981         return cfInfo;
    982     }
    983 
    984     private CallForwardInfo[] handleCfQueryResult(ImsCallForwardInfo[] infos) {
    985         CallForwardInfo[] cfInfos = null;
    986 
    987         if (infos != null && infos.length != 0) {
    988             cfInfos = new CallForwardInfo[infos.length];
    989         }
    990 
    991         IccRecords r = getIccRecords();
    992         if (infos == null || infos.length == 0) {
    993             if (r != null) {
    994                 // Assume the default is not active
    995                 // Set unconditional CFF in SIM to false
    996                 r.setVoiceCallForwardingFlag(1, false, null);
    997             }
    998         } else {
    999             for (int i = 0, s = infos.length; i < s; i++) {
   1000                 if (infos[i].mCondition == ImsUtInterface.CDIV_CF_UNCONDITIONAL) {
   1001                     if (r != null) {
   1002                         r.setVoiceCallForwardingFlag(1, (infos[i].mStatus == 1),
   1003                             infos[i].mNumber);
   1004                     }
   1005                 }
   1006                 cfInfos[i] = getCallForwardInfo(infos[i]);
   1007             }
   1008         }
   1009 
   1010         return cfInfos;
   1011     }
   1012 
   1013     private int[] handleCbQueryResult(ImsSsInfo[] infos) {
   1014         int[] cbInfos = new int[1];
   1015         cbInfos[0] = SERVICE_CLASS_NONE;
   1016 
   1017         if (infos[0].mStatus == 1) {
   1018             cbInfos[0] = SERVICE_CLASS_VOICE;
   1019         }
   1020 
   1021         return cbInfos;
   1022     }
   1023 
   1024     private int[] handleCwQueryResult(ImsSsInfo[] infos) {
   1025         int[] cwInfos = new int[2];
   1026         cwInfos[0] = 0;
   1027 
   1028         if (infos[0].mStatus == 1) {
   1029             cwInfos[0] = 1;
   1030             cwInfos[1] = SERVICE_CLASS_VOICE;
   1031         }
   1032 
   1033         return cwInfos;
   1034     }
   1035 
   1036     private void
   1037     sendResponse(Message onComplete, Object result, Throwable e) {
   1038         if (onComplete != null) {
   1039             CommandException ex = null;
   1040             if (e != null) {
   1041                 ex = getCommandException(e);
   1042             }
   1043             AsyncResult.forMessage(onComplete, result, ex);
   1044             onComplete.sendToTarget();
   1045         }
   1046     }
   1047 
   1048     @Override
   1049     public void handleMessage (Message msg) {
   1050         AsyncResult ar = (AsyncResult) msg.obj;
   1051         Message onComplete;
   1052 
   1053         if (DBG) Rlog.d(LOG_TAG, "handleMessage what=" + msg.what);
   1054         switch (msg.what) {
   1055             case EVENT_SET_CALL_FORWARD_DONE:
   1056                 IccRecords r = getIccRecords();
   1057                 Cf cf = (Cf) ar.userObj;
   1058                 if (cf.mIsCfu && ar.exception == null && r != null) {
   1059                     r.setVoiceCallForwardingFlag(1, msg.arg1 == 1, cf.mSetCfNumber);
   1060                 }
   1061                 sendResponse(cf.mOnComplete, null, ar.exception);
   1062                 break;
   1063 
   1064             case EVENT_GET_CALL_FORWARD_DONE:
   1065                 CallForwardInfo[] cfInfos = null;
   1066                 if (ar.exception == null) {
   1067                     cfInfos = handleCfQueryResult((ImsCallForwardInfo[])ar.result);
   1068                 }
   1069                 sendResponse((Message) ar.userObj, cfInfos, ar.exception);
   1070                 break;
   1071 
   1072              case EVENT_GET_CALL_BARRING_DONE:
   1073              case EVENT_GET_CALL_WAITING_DONE:
   1074                 int[] ssInfos = null;
   1075                 if (ar.exception == null) {
   1076                     if (msg.what == EVENT_GET_CALL_BARRING_DONE) {
   1077                         ssInfos = handleCbQueryResult((ImsSsInfo[])ar.result);
   1078                     } else if (msg.what == EVENT_GET_CALL_WAITING_DONE) {
   1079                         ssInfos = handleCwQueryResult((ImsSsInfo[])ar.result);
   1080                     }
   1081                 }
   1082                 sendResponse((Message) ar.userObj, ssInfos, ar.exception);
   1083                 break;
   1084 
   1085              case EVENT_SET_CALL_BARRING_DONE:
   1086              case EVENT_SET_CALL_WAITING_DONE:
   1087                 sendResponse((Message) ar.userObj, null, ar.exception);
   1088                 break;
   1089 
   1090              default:
   1091                  super.handleMessage(msg);
   1092                  break;
   1093         }
   1094     }
   1095 
   1096     /**
   1097      * Listen to the IMS ECBM state change
   1098      */
   1099     ImsEcbmStateListener mImsEcbmStateListener =
   1100             new ImsEcbmStateListener() {
   1101                 @Override
   1102                 public void onECBMEntered() {
   1103                     if (DBG) Rlog.d(LOG_TAG, "onECBMEntered");
   1104                     handleEnterEmergencyCallbackMode();
   1105                 }
   1106 
   1107                 @Override
   1108                 public void onECBMExited() {
   1109                     if (DBG) Rlog.d(LOG_TAG, "onECBMExited");
   1110                     handleExitEmergencyCallbackMode();
   1111                 }
   1112             };
   1113 
   1114     public boolean isInEmergencyCall() {
   1115         return mCT.isInEmergencyCall();
   1116     }
   1117 
   1118     public boolean isInEcm() {
   1119         return mIsPhoneInEcmState;
   1120     }
   1121 
   1122     void sendEmergencyCallbackModeChange() {
   1123         // Send an Intent
   1124         Intent intent = new Intent(TelephonyIntents.ACTION_EMERGENCY_CALLBACK_MODE_CHANGED);
   1125         intent.putExtra(PhoneConstants.PHONE_IN_ECM_STATE, mIsPhoneInEcmState);
   1126         SubscriptionManager.putPhoneIdAndSubIdExtra(intent, getPhoneId());
   1127         ActivityManagerNative.broadcastStickyIntent(intent, null, UserHandle.USER_ALL);
   1128         if (DBG) Rlog.d(LOG_TAG, "sendEmergencyCallbackModeChange");
   1129     }
   1130 
   1131     @Override
   1132     public void exitEmergencyCallbackMode() {
   1133         if (mWakeLock.isHeld()) {
   1134             mWakeLock.release();
   1135         }
   1136         if (DBG) Rlog.d(LOG_TAG, "exitEmergencyCallbackMode()");
   1137 
   1138         // Send a message which will invoke handleExitEmergencyCallbackMode
   1139         ImsEcbm ecbm;
   1140         try {
   1141             ecbm = mCT.getEcbmInterface();
   1142             ecbm.exitEmergencyCallbackMode();
   1143         } catch (ImsException e) {
   1144             e.printStackTrace();
   1145         }
   1146     }
   1147 
   1148     private void handleEnterEmergencyCallbackMode() {
   1149         if (DBG) {
   1150             Rlog.d(LOG_TAG, "handleEnterEmergencyCallbackMode,mIsPhoneInEcmState= "
   1151                     + mIsPhoneInEcmState);
   1152         }
   1153         // if phone is not in Ecm mode, and it's changed to Ecm mode
   1154         if (mIsPhoneInEcmState == false) {
   1155             mIsPhoneInEcmState = true;
   1156             // notify change
   1157             sendEmergencyCallbackModeChange();
   1158             setSystemProperty(TelephonyProperties.PROPERTY_INECM_MODE, "true");
   1159 
   1160             // Post this runnable so we will automatically exit
   1161             // if no one invokes exitEmergencyCallbackMode() directly.
   1162             long delayInMillis = SystemProperties.getLong(
   1163                     TelephonyProperties.PROPERTY_ECM_EXIT_TIMER, DEFAULT_ECM_EXIT_TIMER_VALUE);
   1164             postDelayed(mExitEcmRunnable, delayInMillis);
   1165             // We don't want to go to sleep while in Ecm
   1166             mWakeLock.acquire();
   1167         }
   1168     }
   1169 
   1170     private void handleExitEmergencyCallbackMode() {
   1171         if (DBG) {
   1172             Rlog.d(LOG_TAG, "handleExitEmergencyCallbackMode: mIsPhoneInEcmState = "
   1173                     + mIsPhoneInEcmState);
   1174         }
   1175         // Remove pending exit Ecm runnable, if any
   1176         removeCallbacks(mExitEcmRunnable);
   1177 
   1178         if (mEcmExitRespRegistrant != null) {
   1179             mEcmExitRespRegistrant.notifyResult(Boolean.TRUE);
   1180         }
   1181             if (mIsPhoneInEcmState) {
   1182                 mIsPhoneInEcmState = false;
   1183                 setSystemProperty(TelephonyProperties.PROPERTY_INECM_MODE, "false");
   1184             }
   1185             // send an Intent
   1186             sendEmergencyCallbackModeChange();
   1187     }
   1188 
   1189     /**
   1190      * Handle to cancel or restart Ecm timer in emergency call back mode if action is
   1191      * CANCEL_ECM_TIMER, cancel Ecm timer and notify apps the timer is canceled; otherwise, restart
   1192      * Ecm timer and notify apps the timer is restarted.
   1193      */
   1194     void handleTimerInEmergencyCallbackMode(int action) {
   1195         switch (action) {
   1196             case CANCEL_ECM_TIMER:
   1197                 removeCallbacks(mExitEcmRunnable);
   1198                 if (mDefaultPhone.getPhoneType() == PhoneConstants.PHONE_TYPE_GSM) {
   1199                     ((GSMPhone) mDefaultPhone).notifyEcbmTimerReset(Boolean.TRUE);
   1200                 } else { // Should be CDMA - also go here by default
   1201                     ((CDMAPhone) mDefaultPhone).notifyEcbmTimerReset(Boolean.TRUE);
   1202                 }
   1203                 break;
   1204             case RESTART_ECM_TIMER:
   1205                 long delayInMillis = SystemProperties.getLong(
   1206                         TelephonyProperties.PROPERTY_ECM_EXIT_TIMER, DEFAULT_ECM_EXIT_TIMER_VALUE);
   1207                 postDelayed(mExitEcmRunnable, delayInMillis);
   1208                 if (mDefaultPhone.getPhoneType() == PhoneConstants.PHONE_TYPE_GSM) {
   1209                     ((GSMPhone) mDefaultPhone).notifyEcbmTimerReset(Boolean.FALSE);
   1210                 } else { // Should be CDMA - also go here by default
   1211                     ((CDMAPhone) mDefaultPhone).notifyEcbmTimerReset(Boolean.FALSE);
   1212                 }
   1213                 break;
   1214             default:
   1215                 Rlog.e(LOG_TAG, "handleTimerInEmergencyCallbackMode, unsupported action " + action);
   1216         }
   1217     }
   1218 
   1219     public void setOnEcbModeExitResponse(Handler h, int what, Object obj) {
   1220         mEcmExitRespRegistrant = new Registrant(h, what, obj);
   1221     }
   1222 
   1223     public void unsetOnEcbModeExitResponse(Handler h) {
   1224         mEcmExitRespRegistrant.clear();
   1225     }
   1226 
   1227     public boolean isVolteEnabled() {
   1228         return mCT.isVolteEnabled();
   1229     }
   1230 
   1231     public boolean isVtEnabled() {
   1232         return mCT.isVtEnabled();
   1233     }
   1234 }
   1235