I've bought Samsung galaxy m20 on February 8th and my phone touch is not working within 3weeks for that i have to lock and unlock phone after 1minute then only touch is working after a few minutes again it happens again the touch is not working pleas...

I have bought Samsung galaxy m20 4gb ram and 64 gb rom.in this mobile i have facing the signal strength issue i have used jio sim and Airtel but there is no signal inside home but i change the sim to other mobile it working so please kindly i request...