Share your experience!
Hi,
I bought my Sony Xperia P a few months ago and I have been experiencing trouble with calling and receiving calls. When it rings, I can't answer the call, it freezes and stops responding. Or I answer and it continues ringing while I talk to the other person. Similarly, when I try calling somebody it stops responding; sometimes the other person can hear me, but my phone takes around 20 seconds to respond. I usually have to restart the phone in order to use it again.
Hope anybody can help 
Hi, try repairing phone software with PC Companion or Update Service.
http://www.sonymobile.com/gb/tools/pc-companion/
http://www.sonymobile.com/gb/tools/update-service/
Be aware that this process will erase phone data completely, backup if necessary.
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Hey,
I tried that a month ago ago, it helped for a few days and then the problem returned
Maybe try booting phone in safe mode to check if any app is causing the problem.
http://talk.sonymobile.com/t5/FAQ/How-to-boot-your-phone-into-safe-mode/m-p/348008#U348008
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Ok, I am going to try that and see what happens.
If another app is causing the problem, how can I know which one?
Thanks for your help 
If that is the case, you need to eliminate them one by one, unless you suspect one.
Good luck! 
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Okay, that will take some time 
But thanks a lot for your help, I hope I'll solve it!
You are welcome. 
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