How can I test if my GPS has a hardware problem? Some days ago, my GPS stopped working. It doesn't lock, no matter how long I leave it on.

I've read this question but had no luck. 

Sometimes it reports that it found one GPS satellite available, but most of the time it gets none.

I also read about stability test, but is doesn't seem to report GPS problems.

So, is there any test I can perform to detect if I really have a hardware GPS problem?

My phone is a Samsung Galaxy S2, with android 4.2.
Try installing and messing with: GPS info and GPS test