5G Home internet keeps dropping!

I've been using T-Mobile 5-G for about seven months now. At first I was having to restart the gateway several times each day. Then for a while between Thanksgiving and Christmas I didn't have to restart it at all. I had read about the problems with overheating so I've put the gateway on a shelf under an end table where there are no other heat sources near by. Since New Years Day I have had to restart the gateway on average once or twice each day. It's really frustrating to be in the middle of a movie or a football game and have to restart the gateway.