My Galaxy s5 is only 3 months old. It keeps restarting on its own. Also connecting and disconnecting from wifi numerous times. It also gets really hot. Is there something wrong with these phones?
Hmm... Did you install a lot of apps in it? That can be causing the phone to heat up really fast. If it's restarting on it's own, I think you should take it to a Samsung service center and have it checked.