I have just got my iphone 4S for a day and the phone does not connect to the internet sometimes even the 3G signal is full. I don't know if this is a hardware or a software issue but I also have this problem on my iphone 4 since I upgraded to ios5.0.1. With both phones, I have to reset the network settings to make it works on 3G again. However, it still work normally when wifi is on.
Does anyone has this problem? Hardware or software issue? I really wanna know the answer