If u r suffering from Contact Service while changing SIM IC then dont heat UEM directly if pasted try this method-
1. remove keypad sticker
2.give some heat in the Blue Circle(Shown in picture) i.e. opposite side of UEM.
Then Check ur Mob if OK then Enjoy else reball UEM i think reballing is the last sol.
NOTE- Precaution While Changing SIM IC- Dear put a wet cotton (Dipped in Simple Water) on UEM then change SIM ic it will protect UEM from heat.
