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

Fajohn,  Thanks for your post, and all of those posting replies to this thread! Although my Nokia gateway always felt a little warm, at first I thought it was just operating normally within manufacturer specs and to be expected, especially when running a few devices over WiFi. However, even though my unit is not in a hot area, is out of sunlight, and has good space around it for air flow, I was also getting repeated dropped WiFi connections, despite always stable and consistently fast Ethernet throughput. Since adding an external USB powered cooling fan (mine is 120 mm in diameter, sits on top, and connects directly to the gateway via a USB A female/C male adapter) immediately eliminated the problem and with no interruptions 10 days so far, I'm also convinced this is likely an overheating issue. If this is accurate, it definitely represents an oversight by T-Mobile, who is either shipping faulty units or providing hardware with significant design flaws. What especially troubles me is that during my three contacts with tech support, none of the reps acknowledged overheating even to be a possibility for impaired WiFi connectivity, let alone a known issue.