This is to solve issues when you can not make and receive calls on your mobile device due to inadequate network in the system of your phone but this is either caused by hardware or software version.SOLUTIONHARDWARE VERSION
This caused by partial contact between the antenna and the panel of the handset. Firstly the antenna should be properly connected to the panel and also clean the surface with methylated spirit for a clean interface.
Secondly, the antenna may be bad permanently simply change it.SOFTWARE VERSION
Firstly, you can search for network directly from your handset by changing the main settings in sim service network from Automatic to Manual.
Secondly dial *0000# and send, you will be required to wait for few seconds and it will restore full network coverage.
Was this helpful ? Do let us know.