Hate to re-open this topic:
I am having issues with the fbb.home APN as well, where fast-tmobile.com works fine.
I am able to connect and use fbb.home, but I get constant random ping spikes over 5000ms according to Discord, and cannot stay connected on most online games. Whereas with fast-tmobile.com, I experience no ping spikes and have a flawless connection. Not really noticing any speed difference between either APN, I am not in a congested area nor am I hitting any bandwidth limits.
Any thoughts? I'm worried about using fast-tmobile long-term would cause issues from Tmobile, but fbb.home is unusable for me with the latency issues. I have tried changing the selected modem as mentioned above but it has no affect.