What's your cable run? how far are you from the tower?
I'm 3 miles with trees blocking clean line of site. I tried various indoor antennas without much luck. Ended up mounting duel antennas on the gable end of my house and running 25' cables
I use the AT&T network but the equipment is very similar. You might post in r/NoContract for specifics on TM (modem). You'll want to make sure that the modem you get covers the bands that the cell carrier you're wanting to connect to use. To get the best speeds you'll want a modem that uses carrier aggregation and MIMO antennas.
Once you have the modem figured out the rest of the setup will be the same as mine and a lot of others that use cellular data for their internet.
2 antennas at 90 degrees to one another (polarized) pointing directly at the tower. Pick a good location for the antennas, a more open spot in front of them if you can, roof mounted works great. If you have a metal roof use a gable mount in a place where you don't have to aim the antennas across the roof. 2 appropriate sized cables to minimize signal loss and what ever adapters are needed to connect the cables to your modem.
Cellular modems often don't make great routers, they're often limited by the amount of devices that can connect and range of their WiFi signal. I have my M1 Nighthawk USB tethered for power and data to my Pepwave Surf SoHo home network router.
Hope this helps, good luck.
Just make sure the modem you get covers the bands available to you.
Different bands use different frequencies and Wilson makes good direction antennas for a multitude of frequencies at a reasonable price.
You need to consider the length of cable from your antennas to the modem, signal loss is real. Try to limit your runs to 25' or less to save on cable cost. I use these ,there are charts down the page that show loss in regards to size and length.