I bought a Sony Xperia SP before a month and handed over the mobile to service center on the fifth day because of touch problem. In service center they reset the software to latest version and there is no touch problem. When I make a call my back button works well until the phone sleeps after the time out or after holding near the ear. When I wake the mobile from sleep my back button doesn't works, home button works well and I can open the messages list, scroll through it but I am unable to click a message from list. Its not only messages it happens with all other applications too and when I click on edit text keyboard doesn't pops up. Once the call is disconnected everything works fine. I thought it was a s/w problem and waited for a update. Yesterday I updated my mobile to the latest version to Build Number 12.0.A.2.254, still the problem persists. Can someone help me?
