There are various issues facing by iPhone 4S such as Battery Problem, Network Problem, Mic issues, Signal searching, outgoing call no audio and many things. Here we found one more bug which is Dropping Network and data at randomly on iPhone 4S.
When you bought iPhone 4S it will work s very perfectly, but after some time it will be in trouble as mention above bugs. You will notice the network is losing day by day and making calls, messages, internet usages and all which feature using by SIM.
So when trying to fix this problem after it’s noticed, you try putting it into Airplane mode and back out. The phone scans for a network and goes back to the same state as before tried this to fix. Tried to resetting network settings, but this doesn’t change anything. The only thing that actually fixes it temporarily is turning the phone right off and back on again.