I brought a Sony Ericsson yari on 10th of December 2010. The handset worked like a charm for 9 months, and then I started having problems with its camera key and the keypad also. I submitted my handset to the nearest Sony Ericsson service center, they repaired it. After 4 hours or so the phone got shut down with the Keypad problem and since then I have submitted my handset Sony Ericsson service center and its still there. Sony Ericsson service center has cheated me by changing my display. Please help me out.