No service after rear case replacement
Dear iFixit users,
Hi. I know there're many different thread with same problem I have.
I read almost all of them, but my problem is till in vain..
I replaced rear case(whole housing) and everything works fine except Network.
Wi-Fi is OK, only 3G/4G is a problem.
I think the SIM is not a problem because the same SIM works OK in another iphone(6s).
Also, I can see Carrier service is correctly detected.
My situation is, it successfully finds the network provider.
But then, it shows 1 bar in the signal strength.
After few seconds the status changed to "No service".
I did many tricks regarding S/W (DFU reset, network reset, date/time reset, ... )
I also checked whole screws of lightening connector parts.
I don't see anything peculiar..
Could you guide me where do I need to check and replace to solve this problem?
Questa è una buona domanda?