It is probably time to re-visit this thread and update where I am with using Cellular LTE.
With all the kids doing remote learning and Starlink becoming more available in our area, AT&T and other carriers are starting to reduce the cost of Cellular Internet and increase the data caps. For example, when I first got the data plan for the farm it was $75 a month for 25GB of data per month. It then reduced price to $40 a month for 50GB of data per month. Most recently it's now $50 for 100GB of data per month. So it's made it a bit more affordable to work remotely. If you're on satellite and paying for 25GB a month and getting slowed down when it reaches the cap, yet your cell phone has a good data connection, might be worth looking at some options.
The other thing I've learned about cellular is using a booster/repeater vs. mi-mo antennas. Think of the booster/repeater as a single antenna, it has to do both the send and receive of the data/signals, so one has to wait on the other. MiMo is multiple user/multiple input. Think of it as multiple pipes to communicate over. Basic Mimo is 2 antennas in/out. 4g/LTE is going to use at least two antennas and give you more throughput. When 5g is more defined, it most likely will use up to 4 antennas.
At the farm, we're running the cellular
booster/repeater I installed a while back. I also have a
Netgear Cellular modem (LB1120), which I have connected to a wifi router. The booster is needed for both our phones and her grandpa's home phone, which is cellular based. Without it, cell service is nil or spotty at best.
With the booster, our download data speeds over the Netgear modem are about 5 - 10 Mbps. On our last trip down there I took an
external antenna made for the Netgear modem. Its a mimo antenna. I plugged it in and went from 4 bars to 5 bars on the modem, however the speeds did not improve all that much. So I then turned off the booster and ran the modem by itself on the external antenna (which was stuck in a window facing the direction of the known cell towers). My connectivity dropped to only 2 bars (zero without the external antenna), however, the download speeds increased to 18 - 20 Mbps.
I just wanted to explain the in/outs of using a booster vs using external antennas for the cellular internet. For the farm we need to use both, so it will be a matter of positioning the booster's repeating antenna where the netgear mimo antenna will not interfere with one another. I won't be using the window antenna, more of a yagi style antenna that is directional and won't pickup the repeated signal from the booster easily, like an omni directional antenna will.
OK, so for the RV. I'm using a used
Pepwave Max BR1 Mini. These are cellular routers that many places like amazon and ups use in their vehicles for internet service. The device is built for LTE and allows you to put two sim cards in it, but only use one plan at time. This is good if you need to double your monthly allotment or need coverage for areas where one carrier has better service than the other. I'm currently only running the $50 a month pay as you go plan from AT&T (100GB). The device also has built in wifi, 2.4ghz only, but plenty fast for LTE speeds. It also runs off of 12v, so we can power it from the RV's 12v system and have internet at all times. I do have a wifi repeater setup that I try to use at the camp grounds when it's available. It has small antennas that come with it, but I've got an external omni directional antenna I'm installing on the roof of the RV. There are also optional directional antennas you can run buy. I may have a directional mimo that I can put up on my mast to get better signals when we're in more remote areas with the RV in the future.
There are various antennas available. Most boost the signal from 7db to 13db, which is quite a bit. You'll have to do your research to see which one works for your situation. If you've got cell towers close by you may be able to get by with the window or an external omni directional antenna, but if it's a ways a way like on our farm, you'll want to look at a directional antenna.
One other thing to mention. Out of all the folks that use the AT&T plan, even though it's a 100GB cap. Many say they go way over that per month and never get throttled to a slower speed. They say that the agreement says that they "may" throttle you if you are in a high bandwidth area. Maybe the same with other carriers, but certainly better than I've read about going over your limit on viastat or hughesnet.