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

Two years after the beginning of this thread and the most recent device, delivered to me 2 months ago, still has heating problems I'm convinced.  The ambient temperature in my home is often between 30 and 33 Celsius in the summer as there is no A/C.  The connection to the nearest cell tower is always 4 bars with a 5G indication.  And the internet connectivity fails systematically.  Customer service likes to mention cell tower work, but the only correlation to these failures in my home is ambient temperature.  My next purchase is a fan.  Having designed with COTS and Mil-spec h/w, I understand that a 5x price differential encourages choosing COTS.  Sadly, for many consumer grade pieces of equipment such as the t-moblie wifi hotspot this is less than optimal choice.  I strongly encourage customer support to recommend fans in the face of the problems reported in this thread.  And for t-mobile to spec a wider operating temperature range for this type of equipment.  Two years should be long enough.