SGS3 in app screen restarts I am having a problem with my Samsung Galaxy S3. I bought this last year. No damage so far. I usually download apps/games in Play store when all of a sudden I noticed my screen blacks out for a millisecond then restarts. 

This usually happens in app/games when I play Smurfs and Sims, and even when I am using my camera and when I view the gallery. Does anybody know how to fix this?

Your assistance will be very much appreciated.
What you're experiencing is probably the "sudden death" issue experienced by several users. You could try updating your firmware to the latest firmware released by Samsung or flash a custom rom to fix the issue.