T-Mobile Home Internet Service - BYOD?

khenze wrote:

I just switched to the T-Mobile Home Internet; received my gateway device; and  I am not happy with signal strength of the device.  I am put on Band 12 most of the time and speeds are terrible.  With my previous provider I used a MOFI 4500 modem on AT&T network and I could lock in to Bands 2 & 4 exclusively and I had no speed issues.  I ordered myself a MOFI 5500 model which includes the 5G bands to use instead of the T-Mobile provided device.  When I moved the sim card from the T-Mobile device to the MOFI 5500 it registers on the network but no internet connection.  If I move the sim card from my phone to the MOFI 5500 it registers on the network AND I have internet connection.  Is there a restriction on the sim card for the T-Mobile gateway device?  How can I make this work?

Did you ever get support here? Having the same issue