Fuj,
I had the T-Mobile internet for about six months at a hunting camp in AL. One of the first subscribers, so no data as to the problems, which were many.
1. Lousy DNS resolution. The modem and computer would not function if the DNS server didn't respond fast endough.
2. Moderate throughput. 80-150 downlink on 4gATE and 5-20 uplink.
3. You couldl not configure the modem as a pass-through gateway to a personal router and firewall.
4. Could not administer the modem from a computer, you had to use a smartphone app for configuration issues.
5. You could not turn off the modem wireless to use your own wireless network.
6. I did not have a printer at the time, to get a copy of the return label I had to go by a UPS store and have them print out a label.
7. PW configuration changes on the modem didn't seem to take.
It's a halfway decent service, but lots of caveats. It may not work in the way out boonies of the south which show up as no coverage areas on the T-Mobile maps. Also be aware T-Mobile is trying to move old customers who use a plan with a promise of no increases, ever, to a higher priced plan. The old plan customer has to call T-Mobile to tell them not to move them to the new plan. They may eventually do the same with the internet service users.
YMMV,
DocBII
I had picked up a new all in one big screen Dell Optiplex with Win-10.
A T-Mobile store is near me, so I signed on the dotted line and they
handed me a unit. One worker told me, I would need a to do the cell
app to get set up, where another said if you have Windows 10, just go
into network set up and add the T-Mobile domain code listed on the
bottom of the unit. The computer has built in WIFI, so the two units
do a simple hand shake, and I was off and running. Except for one
corner of the house I have bad 5G signal from the gateway to the
computer, and why I ran a cable direct and switched off WIFI. I'll
easily get a good 100 mbs more with the cable then with WIFI at
opposite ends of the house. Checking Ookla Speed test just now,
I'm down to 189 mbs which is not bad for a Friday afternoon. I'm
also lucky that I'm at the outskirt's of the city of Erie, and towers
are all over the place, but for some reason it only likes to be placed
by a window in the northeast corner ??