Thermal Issues With Home Internet Gateway/Router as a Cause of Dropped/Slow Internet or Wi-Fi Connection

I can say without a doubt this is an overheating issue. The first gateway lasted 8 months without any issues and only 2 bars. D/L speeds of over 50 most of the time close to 100. Once the issues started the gateway would reboot every 5 to 10 minutes during heavy throughput, 4 to 5 devices connected. When I lost connections, I would walk over to the gateway and it was powering back up every time. This went on for several days until I got it replaced with my second gateway. Within a few days the same problem started and I put a fan on it and the problem went away. Took the fan off and problem came back. I'm now on my 3rd trash can and have not seen any issues yet. I do not have the time nor am I going to do what T-Mobile should have already done, collect the stats to confirm the issue and rectify it.