Phone signal problem
Why my iPhone not getting SIM card signal if there is no internet
iPhone 4S, iOS 5.1.1
Why my iPhone not getting SIM card signal if there is no internet
iPhone 4S, iOS 5.1.1
What does having Internet access have to do with whether the SIM works or not?
What have you done to troubleshoot besides asking strange questions?
I am getting the same problem as you are. I tried many time to find a way but It did not work. Most of the time is an software problem and you need to re-install your software. Most of the time , the problem will be solved.
Phone signal problem