Semi-Complicated Network

I have watched this guy before. He does make some good points. I had forgotten about the enable SSID switch. It makes sense if you do not have the SSID enabled then it should turn the radio off. Another source of information is on Redit as there are guys there that are having multiple conversations about the T-Mobile router. He is right taking the shell off to make external antenna connections is pretty easy. The MIMO 4x4 log periodic antenna can make a big difference in improving signal quality by reduction of noise and a stronger signal. You stated you had packet loss. Look at the signal strength RSRP and the signal to noise ratio SNR and try to improve the SNR as best you can. The waveform.com site has information about some external antennas but they are not cheap. The guys at waveform are very helpful and great about answering questions. I know I could improve my signal with the external antenna and have more flexibility to better locate my router in the house for WIFI signal spread but the ~$400 price tag for the antenna is more than I really wanted to shell out given other expenses from moving across country. 

https://www.waveform.com/a/b/guides/hotspots/t-mobile-5g-gateway

When placing the router it takes a little time to dial it into the best location. If there are multiple towers about there can be noise so using your house as a shield to get the signal you need and avoid excess unwanted noise. I found the window with direct north exposure to the tower was not the best one. I found a better signal with improved SNR in a NE window adjacent to the north facing one. If you can see the tower and know it is the one your signal comes from that is helpful. T-Mobile support should be able to provide tower coordinates if you ask. There are web sites you can look up where the T-Mobile towers are also. www.cellmapper.net is one site where you can get information on 4G LTE and 5G NR tower locations. It may not have the most accurate information on a given tower if it is not updated. A conversation with a T-Mobile support engineer should provide the actual location of the tower associated with the PCI signals your router receives.