As a user of T-Mobile Home Internet (TMHI), and someone who answers questions about the setup in this forum, I thought it might be helpful to post a few videos on the setup. There are many setup videos available, but the one linked below seems easy to follow and understand. For advanced users, you will find it boring.
NOTE: if you are in an area where a T-Mobile cell tower is not close, your signal and performance may not be adequate and this service may not be for you. However for me and many others, we are within about 1-2 miles (line of sight) of our cell tower for 5G service. If so, you should get “4-5 bars” and get over 75 - 150+ Mbps download speeds.
Also - you can change your SSID / wifi network name and password (please do so) during the setup process when using the T0Mobile Internet app to setup your new gateway/device.
And, with the second video, if the user would have rotated his gateway a few degrees and waited and check his signal, he would have probably seen a signal improvement (the 5G antennas are located at the corners of the gateway). Most users find that using the process of rotate - check speed/bars - repeat, provide good results.
Finally, use the include app function to set the gateway/device close to a window and inline with your cell tower (placement function in the internet app). I used “share location” and “camera” to point your camera in the direction of the cell tower in your area...seemed to work well.
I hope this helps the greater TMHI community. Did it help you setup your T-Mobile gateway? What are your speeds (speeds will vary based on your location)?
All the best!