I have an xperia sp C5302 and i am from india. yesterday i just received a minor firmware update from sony for my phone 12.0.A.2.254 . after updating my phone to this version i cannot receive or send calls neither send or receive messages. the previous firmware version 12.0.A.2.245 was working perfectly. I performed a repair also but the same problem. Without going to the service centre how can i solve my problem. admin please reply really important. Or tell me i do i rool back to the previous version.
