I'm using Sony Xperia P. It's notification sound is not working upon getting a new message. But its getting vibration. I tried the factory settings, repaired using pc companion and tried the different settings. Now I got Jelly bean update, still the problem continuous. Please help me to solve this problem.
Hey . This is because of a USSD code running in the background that causes your notifications sound to stop and it's because of the service provider ,not the phone .[In my case - vodafone]
Set default notification tone to silent.
Go to messaging settings and chose whatever ringtone you want.
For Gmail,go to label settings and change there.
Repeat the same for other apps that you need and your problem should be solved .
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