Looks like T-Mobile is going to start phasing out 4G LTE next year.
Degraded 4G LTE performance at some point, that could mean less coverage. I might miss a lot of texts and calls, if I have no cell signal at home.
Looks like I don’t need to bother getting a SIM card after all.
Could use a phone as a hotspot with the r1, if using Ubuntu Touch on the r1, and an iPhone, you may need to enable the maximum compatibility. Or get a hotspot of some kind.
Not sure they make 5G flip phones. So that might not be a good option either.