I don't see it mentioned anywhere else in this thread, so here you go.
T-Mobile is doing a 55+ plan.
"Starting August 9, qualified customers can get T-Mobile ONE for the incredibly low
price of just $60/mo total for two lines with
taxes and
fees included (after $5 per line AutoPay discount). This includes unlimited talk, text, and 4G LTE smartphone data along with other great T-Mobile ONE benefits!"
Looks like T-Mobile ONE is effectively all their services included, which includes tethering (at 3G),
partnership with GoGo for free inflight (I've used it, it's good), and international coverage.
https://www.t-mobile.com/offers/t-mo...53D05SGJSG9625
As for
hardware, they've got good offerings. But I only
research flagship phones and it sounds like that's not what you're interested in. I would recommend the Galaxy S7 Active, but I just read some reports that it somehow doesn't
work great on T-Mobile. I find that hard to believe. The S8 Active is on pre-order tomorrow, apparently.
https://www.theverge.com/circuitbrea...-s8-active-att