Share your experience!
xperia p network gets disconnected often and the only way is to restart the phone, how do i fix this issue?
even i do face the same problem.which service provider are you using? I am using DOCOMO.i hope such things are taken during the ICS update.Hope sony is listening
Only solution for this is to wait for the fix, that we likely to get in the early august 
Its a known issue. People are furious about this. Check out this link
http://talk.sonymobile.com/thread/43345
Sony will be releasing a fix in the month of august. Hopefully things will be resolved then.