1 # 10\. Software Compatibility Testing 2 3 Device implementations MUST pass all tests described in this section. 4 5 However, note that no software test package is fully comprehensive. For this 6 reason, device implementers are **STRONGLY RECOMMENDED** to make the minimum 7 number of changes as possible to the reference and preferred implementation of 8 Android available from the Android Open Source Project. This will minimize the 9 risk of introducing bugs that create incompatibilities requiring rework and 10 potential device updates. 11