http://forum.xda-developers.com – I'm not allowed to post in development section so i post here info about error while changing ringtone in CMX Code: E/AndroidRuntime( 2086): FATAL EXCEPTION: main E/AndroidRuntime( 2086): java.lang.RuntimeException: Failure delivering result esultInfo{who=null, request=100, result=-1, data=Intent { (has extras) }} to ac ivity {com.android.phone/com.android.phone.CallFeaturesSetting}: java.lang.Null ointerException E/AndroidRuntime( 2086): at android.app.ActivityThread.deliverResults(Ac ivityThread.java:2719) E/AndroidRuntime( 2086): &n (HowTos)