[atombender]

T-Mobile One is $70/mo with autopay for a single line. It goes down to $40/mo if you have 4 lines.

T-Mobile One is actually unlimited, though they say they will deprioritize your traffic if you use a lot of data. This is still better than some other vendors that start to actually throttle you down to 3G speeds. Also, T-Mobile's tethering is not throttled, unlike some other vendors (e.g. Verizon's "gounlimited").

Last I checked you could still get their cheaper "Simple Choice" prepaid plan for $40/mo, but that's very limited data-wise, something like 2 or 3GB.