Run dual internet providers at home

[aaiyar]

@user2164

Unfortunately, the T-Mobile modem/router cannot be switched to bridge mode (like the Xfinity modem/router), so I haven't been able to figure out a way to hook all this stuff up.

This is accurate. Also TMobile uses CGNAT, but none of this affects its function as a backup internet source.

You do need an opensource app called HINTControl to configure the gateway.

FWIW, my setup is identical to yours, except that I’m using a unifi UCG Max as the router/gateway. I have AT&T fiber as primary and T-Mobile as backup. Details are in this post:

T-Mobile Home Internet Backup?

For anyone else interested in doing this. Just received the T-Mobile gateway, and set it up using the T-Mobile app (as directed in the instructions). When you do that, it disables the ability of the HINT Control app to login as admin. The solution for me was simple. I factory reset the gateway, and directly connected it to my iMac using ethernet. I then used HINT Control on the iMac to shut down the 2.4GHz radio. It is recommended not to shut the 5GHz radio, so I didn't, but I reduced its power…