Traded in my S3, that had been doing well over the years but started losing charge more quickly, for an S6. First one overheated so badly when running updates t

Traded in my S3, that had been doing well over the years but started losing charge more quickly, for an S6. First one overheated so badly when running updates the first time I thought I would burn my fingers. Traded it in thinking it was a bum phone. New phone heats up but not as bad. Lost charge very quickly very fast though and will freeze with video at times. I use a quick-charging cable now to keep it 'topped up' to take to work each day. Looking forward to trading it in ASAP for a non-Samsung phone.