Hello since I update my phone to Android 5.1.1 my phone no ring.if restart it, it is normal and ring normal but after 3 or 4 hours my phone not ring. What?
Could you please elaborate? Do you mean that when someone calls you, you do not receive the phone call/no indication that a call is incoming etc? Or do you mean that you there are no sound or similar when the phone rings?
Do you use your own ringtone or a default tone? If you use your own ringtone, is the file stored on the SD-card or the internal storage? You should store the file on the internal storage.
Otherwise, it can be related to a third party application. Can you boot the phone into safe mode to see if same thing happens after 2-3 hours?
