My fri device, N7105 and he is totally a noob about phone. 6 months ago, his phone power was dead suddenly and so he sent to the shop (not certified service center). After phone power was back, he noticed that android verison was lower than his previous state. So he went back again to the shop to upgrade android versio as original state,4.3. When i start to have a look at his phone and its not functioning well and the big things i found out was imei unknown but still have 2g network (cant use 3G or 4g )at all. How this problem occurred? May be downgrade after reviving power? In fact i just want to help him if there is a way to do rather than going back and dealing with unskillful service men. I dont think imei will be restored just by flashing latest stock rom. Is there any way to restore IMEI?
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