bhai....lagta hai hai display ud gaya hai.......sirf software problem hai....!!
service center pe jaake theek karwaa lena...
and ya.....waise to software update ki khaas zarurat nahin hoti...but still if you want to have one......toh service center se karaaya kar...!!
another thing.....save your phone data in your pc before givin it to d service center...your phone will be formatted i guess.....!!!