Unable to sitch on gps on htc p3600

More information might be necessary:

Are you still using the original software that came with your phone, or have you flashed a new ROM onto it? Have you flashed a new radio ROM onto it? If you don't know what I'm referring to, then you are probably using the original software. :)

The easiest way to test your GPS on the P3600 is to go outside and stand in the open without any obstructions in the sky (ie: no trees, buildings, etc. around).

Start the camera and in the upper left corner you will see a little camera icon with arrows pointing left and right. Press the left arrow until you see a camera with a cross-hair over it. This starts the GPS on the phone and it will say "GPS Initializing GPS...". Give it a few minutes, especially if you have not used it before. It might take as long as 5+ minutes. If it times out and says it was unsuccessful, just try it again. It should work after the second or third try.

If not, then you probably have either a hardware problem with your GPS, or the Radio ROM needs to be re-flashed. If that's the case, it is more complicated, and I will get into that with you in detail if needed.

Good luck!