My iphone 5 have been acting weird recently, it was with ios 9.3.something. I disnt use it for a longtime since i broke the screen. I decided to fix it. Then i am not getting any signal, it either search or no service. But one sim i used seemed to pick up the network perfectly, but others they dont! My iphone is unlockked by the way. I decided to upgrade to ios 10.3.1 now i do get signal from other sim cards but its really poor! It get lost rapidly, and when the signal is lost i have to turn airplane mode on and off to regain signal back. What could be wrong?
Read more: Why do i have to turn airplane mode and off to regain signal?