Can't connect Google Mini to T-Mobile Home Internet

Khimba29 wrote:

My google mini works fine as an individual speaker but it won't play as a group of speakers (multiple speakers in different rooms). Any known fixes for this? I set up the 2.4 network thinking that would fix it (since that's how it works with my current ISP) but no dice. Support from Google and TMO can't really figure it out either. 

I have this same issue. I've tried so many things, including factory resetting all my nest speakers, and they never work in groups, but each works perfectly on it's own. There's something odd going on either with Google or T-Mobile that is keeping speaker groups from working, but I can't find any solution. Does anyone have speaker groups that do work with the home internet gateway?