Ever since I updated my phone to iOS 10 on the day it was released my phone had been running warmer than usual during tasks. While watching videos it gets warm to the touch on the back. I've also had 2 experiences of it getting VERY hot when charging. In the car I plugged it in to charge at 50% and I looked down and it was down to 28% and the phone was very hot. My phone then was very warm last night when I plugged it in to charge and it then slowly cooled down. Has anyone else experienced this?