after owning a SGS for almost 4 months without a hitch I traded it for a SSAW 3 weeks ago. It has worked flawlessly up until this morning. The screen would stay on for a couple of seconds and as soon as it touched it, to either input my code or try to reboot the screen would disappear. It was very strange....I couldn't reboot and I couldn't do Anyang else. Ultimately I unpaired the watch from my phone and re-paired it and everything has been fine since. I just thought I would post this in case someone else has the problem and needs a solution. I'm hoping this was an extreme aberration.