1st Switch off your device, now remove the battery or sim card &Put it again. Thenturning on the phone.& wait for few second  if signal not found ...

Hare is the Details basic Repair process a   no network mobile Phone, or how to Fix a no network mobile device ,

 Its very tuff to identify china mobile ic, they are  circuit diagram are not available in the market so in that repair time  we can’t understand the which ...