This journey I've been on has tested the fringe locations. With my setup I'll link below I have not been without Internet since it was installed in Nov 2018. I have not needed nor have I used the Websoost 4G-X that's installed and I also carry a Weboost RV 65 I'm trying to sell as it has not been needed either.
What I have and use for primary:
Pepwave BR1 MK2 LTE-A Router (this allows for 2 x Cellular SIMs and does WiFi 2.4 and 5 Ghz)
*TOP PRODUCT 2023 & 2024* The Pepwave MAX BR1 Mini HW4 Cat 7 is the ideal mobile broadband router for fleet management, video surveillance, kiosks, and other M2M applications. This rugged metal router comes with a certified embedded Cat7 LTE-Advanced Modem for AT&T, T-Mobile, FirstNet...
5gstore.com
Panorama 5-in-1 antenna which I recommend simply mounting on the top of your front air conditioner cover. Easy mount and highest location, it works great.
Panorama Low Profile LTE/GPS/WiFi Dome Antenna
These are picks as of Nov 2018!!! As of this writing Jan 2020 I have no need to upgrade anything, it works well.
To consider:
MAX Multi-Cellular Router > Peplink
4G/5G Routers, Antennas, Boosters, WiFi, IP Switches
5gstore.com
Another site to review products and prices:
Home - LivinLite.net which their store goes to
MobileMusthave.com - LTE Routers, 4G/5G ready, Antennas, Cables and Accessories
More expensive is the Cradlepoint lineup but has the only CAT 18 modem unit that I know of as of this writing in a product like this (Verizon 8800L is CAT 18 as well).
cradlepoint.com
If Sprint is ever an option then you need to make sure the unit is compatible, I think only CAT 6 modems work with Sprint right now. I do use Sprint as I have their hotspot plan and sometimes it is faster by 99% of the time AT&T is my winning option. I'm fortunate to have the Mobley plan. You could try to get the Connected Car plan but it has risk, most I know of are using it fine.
I like Pepwave as it's easy to use and has a new feature called "Enforced TTL" which helps us hide that we are using a hotspot and cellular providers can slow you down if using a hotspot vs. a phone so it's tricking the system. It's helped me quite it a bit as far as I can tell by getting great speeds on the Mobley I didn't get in the past.
Again, I suggest call 5GStore.com and talk to them and get other opinions. I also welcome other opinions from anyone on this site that wants to chime in.
Just realize, this tech evolves fast, this may be something you'll want to change out every 2-3 years. We have a potential Satellite based Internet system coming in a year by Elon Musk, 5G is coming but I think it's marketing buzz right now with cellular companies using the 5G name when it's not really 5G such as AT&T uses "5G Extended" which is misleading. Marketing nonsense.