Had this problem a while. Smart cast wont work right, skips and freezes, unless I delete phone frome tv and restart tv. I try to reconnect and first try it wont but the second always does, then it runs perfect but if I disconnect and try to reconnect I have to do it all over again. How can I fix it? It's a samsung tv, no internet/ wifi it's all offline. My galaxy s7 and a20 work every time I use them but the s21 won't. The problem started a couple months ago I was streaming a movie and the power went out for a moment then came back on and since then I've had this problem.