Random digression, but if you're having problems with GPS reception on your S3, try tightening all the screws on the back of the device with an eyeglasses screwdriver or similar. The GPS antenna(e) are in the screwed-on backplate and connected via sprung contacts to the mainboard, so if the screws aren't tight, it won't make a solid connection. You can also try removing the backplate and (gently) prying up the spring contacts at the bottom of the motherboard, and then cleaning both them and the contacts on the backplate with isopropyl alcohol. I bought my S3 used and couldn't get a single GPS fix, but after tightening the (noticeably loose) screws, it now happens in a few seconds.
