I bought an s7 edge last September, and from the get go it over heats on the slightest of use to point where it burnt my hand, twice!! I've sent it in for repair thrice. According to samsung they've replaced the motherboard each time but doesn't seem like it as the day I bought it, I had put a jelly protector on the back. And apperently they didn't take it off for repairs each time even though the internal can't be accessed without taking the back cover off. A little insight will be extremely appreciated.
