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Daxesh

In my xperia P if i m change vibrate profile than if i call some one automatically profile change in to normal so solve my problem.

Alexander1

Sounds strange!

Are you sure you don't press the side volume key?

Try restart your phone by press and hold the power button and the volume up until the phone vibrates to see if that can solve your problem.

Daxesh

yes without touch any key profile change & if profile is normal than change to vibrate . profile change at the time when I was calling.

i try ur advice but still problem going on.

Alexander1

Go to settings > apps > Smart Connect > clear data. Restart your phone and try again.

If you still experience problem you can try to start your phone in safe mode. Press and hold the power button > press and hold power off > then you get the option to restart in safe mode. If this behavior doesn't appears in safe mode it is probably caused by some downloaded 3rd party app you have installed in your phone.

If the problem persists you should update/repair the phone software using PC Companion:

http://www.sonymobile.com/update

In PC Companion, click start under Support Zone > start under Update phone > select Repair phone (in blue text).