iPhone 4S Facing Signal Issues? Here’s How To Fix It [Guide]

Since it is released one and half month ago only, users of iPhone 4S suffering from many problems to work through. First, the battery life issue, now another issue facing the iPhone 4S, signal loss issues for no reason. The problem is not due to the antenna because signals are not lost when you hold it in a certain position. The signals are lost suddenly, at one end you have a full 5 bar signal and out of the blue you get the ” No Service” message.

The problem discovered by one of iPhone’s user who reported on the Apple discussion forum that he just bought an iPhone 4S and experienced a loss of signals stopping him from making calls and text messages but he still could access the internet. Sometimes its the other way around. And at other times, all 3 are gone and he gets “No Signal” where the iPhone normally says Vodafone UK. He tried to fix it by putting it into Airplane mode and back out. But that doesn’t work and neither restoring factory settings doesn’t help either. The only thing that brings a temporary fix is turning the phone off then turning it on again.

Razorianfly.com has announced that the problem can be fixed by turning off the ‘SIM PIN’ feature. They suggest the problem is software related.
Go to Settings > Phone Menu > Turn SIM PIN off.

It’s a software related issue. iOS is cycling the radio on and off for some reason. What you need to do is turn on SIM pin then turn it off, at which point it will demand the PUK code. You will be able to get it online through your AT&T account. After you enter that PUK, go back to settings and turn SIM pin off. You might get rid of the problem.

Another user reported that the problem started after updating to iOS 5.0.1. He claims he is facing some serious problems with signals after updating to iOS 5.0.1 and the problem didn’t persist when it was on 5.0. The user claims his iPhone is useless.

Apple might fix the problem in iOS 5.0.2 which is scheduled to arrive as soon as next week.