Ring Doorbell pro

The issue is with Ring doorbells, not T-Mobile. So some T-Mobile support may know the problem, and others won't (but this is something that should be put into the T-Mo knowledge base by those who do know). Ring doorbells don't work with wifi 6 (802.11ax). So you need to get the doorbells to connect using one of the other versions of WiFi.  The two methods described above allow the doorbells to connect on a non-wifi 6 band. I connected mine using the method QCATrader did, but Tiff007's method should work, too.