Home Internet Goes Out Every Couple of Hours

I switched my home internet to Tmobile last June and haven't any issues until this week. My internet keeps going out every couple of hours. Turning the tmobile router on and off temporarily fixes the issue only for it to happen again sometimes in less than a half hour. When it does this I can connect to my wifi network but it doesn't have internet connection if that means anything specific. My signal strength on the home internet app always shows Very Good or Excellent. Does it matter that I got a new Sony TV last week? Sometimes it's on only the 2.4 ghz that stops and the 5ghz will still work sometimes it's both. Any help or ideas would be greatly appreciated.