Two times since getting my Tbolt at launch, I've had experiences where my phone gets hot when I'm not using it. I rebooted it both times & when it comes back up, I've found new galleries on the phone with spam. First time was a vodka (I can't remember which) with a couple pics of the vodka bottle, Facebook and Twitter icons. This last time was the Sons of a gun TV show Both galleries were identical...quality pics w/ the Facebook and Twitter icons. I've since installed bit defender and I don't have any questionable apps on the phone. Was this most likely via a browser/malware site? Where should I start looking to see where these galleries came from?