iPhone 4S loses GPS accuracy

My iPhone 4S is 2 years old. Today, the accuracy of the GPS is really bad. Before, it worked very well… I tried to restart but didn't help. Is there any way to know if this is a hardware error?

I also have an Android phone, and it has very good accuracy, so it isn't something "from above".

Is my phone coming to an end?

I tried everything I could think of, but I eventually completely reset the phone and did not restore my old configuration. I started from new with my iPhone and now it is working fine.

I would first suggest getting a new sim card from your carrier to rule out any issues on their end.

If this does not solve the issue, the Apple Store has an advanced hardware diagnostic utility which would easily diagnose such a problem.