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      1 ## 9.6\. Premium SMS Warning
      2 
      3 Android includes support for warning users of any outgoing
      4 [premium SMS message](http://en.wikipedia.org/wiki/Short_code). Premium SMS
      5 messages are text messages sent to a service registered with a carrier that may
      6 incur a charge to the user.
      7 
      8 If device implementations declare support for `android.hardware.telephony`,
      9 they:
     10 
     11 *    [C-1-1]  MUST warn users before sending a SMS message to numbers
     12 identified by regular expressions defined in `/data/misc/sms/codes.xml`
     13 file in the device. The upstream Android Open Source Project provides
     14 an implementation that satisfies this requirement.
     15