My XperiaC6902, suddenly comes into Emergency call State, I can't make any call neither can I use any applications, Although I can receive calls.I have tried reinserting the SIM card and also restarted the phone but nothing changed. The homescreen shows by operator's name (Airtel) and Emergency call symbol and key-board symbol. On touching the key-board symbol, two options are shown-- 1) Xperia Chinese keyboard, 2)International Keyboard. Please suggest a solution.
