I wonder what the catch is for that service. Seems to me they had similar offers in the past and they did not keep their promise.
Would be worth checking out but unfortunately tmobile signal is so bad in my area, that it only works outside.
That's one catch: signal strength at device location. I'm interested in finding out if the latest device has better antennas or some way to DIY external antennas.
And even with good signal, cost per bandwidth isn't very good. I'm paying $90/mo now with Cox and the T-Mobile speed will be less than 1/4 of Cox. But for 1 TV and browsing that is more than enough.
Another catch is ethernet speeds. I tried this service when it first came out and dropped it for two reasons: (1) I have a bunch of stuff on ethernet because the devices predecessors predated high speed WiFi. It annoyed me that the GB ethernet off the initial T-Mobile device was slower than the WiFi. Since all those devices are WiFi capable, I'll just switch if the new device ethernet isn't better than the last one.
The other reason was: (2) I liked having a router I had lots of control over. The T-Mobile device is much more black box. I need to let go. LoL
The only possible very tiny downside for me to try this is if I drop Cox, several email accounts will disappear. Even if I went back to Cox later, they don't offer email anymore. But I saw that coming years ago and switched to email addresses under a domain I own. Still, it's possible someone might someday try to contact me thru one of those old Cox emails that just get spam these days.