An app on my phone keeps making a ringtone (surprisingly loud), but I don't know which app or what it's trying to tell me. It comes in waves, usually quite a few in the morning to early afternoon. Then it may not happen again for a few days or a week. Someone suggested it was the Facebook app (a good guess) but deactivating the notification didn't help. Any way to isolate the app? Could it be something about software updates?
Motorola Droid model XT912
Motorola Droid model XT912