When I'm in Safari for a good bit of time the phone gets heated up, like any electronic device working for a while, and it will exit me out of Safari to the home screen. Is this normal, and just heating up? Sometimes, though, it will exit me out within 5 minutes of working on Safari, and the back won't be heated. Is this normal, and is this doing any damage to the phone? Also, is there anything I can do to prevent it? Thanks so much!