T-mobile 5g home internet forcing to tower with no data issues/changing towers/bands

 Before reading, know that I consider T-mobile a saving grace for the location I'm in.  Was able to get rid of highly reviewed, costly, unlimited? only throttled to 1mbs after 10GB, satellite provider after more than 2yrs, even before doing all the following tweaks.  Thank you T-mobile. Everything that follows was done with a wired inline wireless router for wifi, following the gateway & T-mobile wifi not needed.

  Been through this myself. Had to put the gateway in the attic (very hot in summer) to get a fair signal. Found the (Nater Tater) YouTube videos & followed his instructions (I think) for disabling the wifi settings, then still added the fan.  The fan helped a bunch, but still hot to the touch.  Even though a page on the app said the wifi was disabled, on the network page still showed 100% transmission power.  I lowered that on both the 2 & 5ghz to the lowest at 12%, what looks to be the higher 5g still shows 100% but is not accessible to lower. (Firmware ver. ending in .178) I can now hold the trash can in a bare hand without feeling blisters will develop.  The bands no longer dropout (by design they do, for heat protection of device).  

  Before I bore with all the small stuff - If you are going to try Tech support, the first thing they will want you to do (if they can't connect to gateway remotely) is a total power down & wait (hard reset) process, of the gateway.  My suggestion would be to do this before hand, at what you suspect would be the least congested time of day.  If its going to work, it should update firmware, if needed. If doing this during a congested time of day chances of timing out before update (or patience) completes are most probable.  If you still need tech support, I would call during your local area working hours & request of the robot operator, a call back (more likely to get someone within a hundred miles or so of you).  Being an Okie, with a low baud rate, can lead to confusion for all parties, whether it be a Millennial, New Yorker or Hindu. In my case tech support couldn't connect remotely & immediately wanted to send a replacement gateway, I declined, knowing it worked well most of the time, & would search for overheating solutions on my own.  If you do a hard reset & it never connects, I would go with a replacement request/offer.  Firmware Version also seems to make a big difference in which app will allow gateway control.  The original firmware on mine, the mobile app had all the control of reboot & setting changes.  The .178 firmware seemed to swap control more to the desktop in Windows, while the mobile app lost control of reboot ability.    

  In my situation, home location is the biggest factor, limiting speed to about 40mbs at best, then network congestion, knocking speed to less than 1mbs (sometimes a forced speedtest server change will make an improvement - improves speedtest app only) other times, if slow enough that Netflix pixelates, a gateway reboot can help. 

  Turning off cellphone wifi calling & mobile data improved internet interruptions & call quality.  Downgrading 5g phones back to 4g made cell call reception better (telling me the gateway is locked in to 4g lte).  The same 4g phones that get speed tests of 40mbs at home, get at times, over 200mbs downtown, about 3 miles from home.

  I must go search for new routing system to replace the high dollar router that crapped out yesterday after 10 months use.   Good Luck, wootken