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.