Since you mentioned business, and if this is something where the business may not be able to wait for several days for times when you are in weak to zero coverage, then you really need to take sometime and come up with an arsenal of data/phone connection opportunities
These fellow RV'er's have done a good job of putting lots of info together on their site:
Don't worry when you first go to their site, as it has from just high level introduction to all the things you need to know - all the way up to Geek Squad Overloading information too
! (They have a pretty good handbook, of basic info, that is well worth the funds to obtain.)
And by the way, great input from the CC members - a well rounded group of travelers, so not surprised
OK - So here is my input, in no particular order:
> Where you will travel, can greatly effect what is the best service/plan to have.
> My wife and I travel mostly Western side of the country, and we have both Verizon and ATT. We have found that the two of them combined, provides us with the greatest opportunity to have data coverage. Where as 10+ years ago, it was about 75% of the time Verizon would have coverage where ATT did not. This has dropped over the last few years down to a SWAG of about 90-95% of of the time they both have coverage. But, that 5-10% of the time to us, it's worth still having two separate carriers.
> On Verizon I use a Samsung S6 in Hotspot mode. On ATT my wife has the iPhone 7, and we also have a dedicated Hotspot the Unite Explore.
> As we travel areas frequently where we're on the fringe of coverage, we do have a roof top antenna, and cellular amp. (Maximum Signal is what we currently have. And we also have a WeBoost Sleek from before we obtained the Maximum Signal. The Sleek is less expensive, and does not do as good of job of amplification/pulling in a signal - but it is for sure better then nothing. (We used various Sleeks over the years, until we decided to go with the higher power Amp's. So they're a good value per cost, but will not maximize your chances of getting a useable signal.))
- I mentioned the ATT Unite Explore Hotspot. This is a data only device. Verizon also has them, the AC791L is their current Jetpack/Hotspot top device. These are important to consider, as they have MIMO antennas. (Two separate antennas to handle communication to the cellular towers for up/down loads of data. In the right areas, say from '2 bars up thru 5 bars' - these MIMO capable devices can dramatically increase your data speeds. (If you want to stream, say Netflix or Amazon. Or say you get a Dish or DirecTV but then want to do On Demand broadcasts - the higher data speeds are important to support this.)
These MIMO devices, both of them, can be helped by either the above mentioned Cellular Amps with rooftop antennas. And they also both have 'Dual Antenna Ports' - where you can also get stand alone roof top (Or for less signal gain, internal to the RV too.) antennas. (Mobile Marks, Panorama are two such units that can also go onto a roof top, and provide 'MIMO' enhanced communication to the cell towers.) (Probably going to much into this. But the key, is the MIMO Hotspot devices, in many areas where we travel, can really be of great help in providing download speeds. For example, where we are now, my wife's iPhone 7 set up as a Hotspot, can get between 9-12 Mbps download speeds. The Unite Explore MIMO Hotspot, is able to pull down 18-24 Mbps - a sizable difference.)
> Park WiFI can sometimes be very good, and sometimes not so good. I see a general trend that I feel will continue, of them improving more and more in the years ahead. Maximizing your ability to also use park WiFi, you could look into a combo WiFi and Router. Pepwave, Cradle Point, WiFiRanger are some popular ones. (RVMOBILEINTERNET does a good job of explaining these, and how to use them.) But one key advantage to a good quality WiFi Router combo, is you can then set up all of your internal Data needing devices to log onto this WiFi router. Then as you determine what the best source for the actual connection to the internet is for a certain area (Park Wifi, ATT iPhone, ATT Unite Explore, Verizon Samsung S6 in our case.) you then connect your combo WiFi Router to whichever device - and all of the inside things are good to go. (Inside things? Laptops, tablets, smart tv's, Pandora/Spotify playing HiFi, etc.)
I'm going to stop here. This is like any other new thing you come along, some of the buzzwords are confusing and often used interchangeably just to keep us all confused - but it really is something that can be understood... Just take your time, do what you've been doing asking questions. And come up with what you feel is the best steps for you. Do things in phases (Wifi vs Cellular Data). When having a tech help you, or when doing things yourselves, think 'future proofing'. (For example: If setting up an Communication Control Cabinet. Set it up with 12V and 120V power feeds. Set up with a conduit, or two, for cable feedings into it from say the roof top. If adding a rooftop penetration to feed cables down into the coach, add more then you need an do it once. (We added two four gang access boxes with 1 1/4" access ports to our rear cabinet space. We're using one for primarily solar cable feeds, and the other has been our cables to our Communication Control Cabinet. Technology changes, and having the ability to more easily access and pull cables in the future, is such away of 'Future Proofing'.)
As you two get out and going on the road. Many new opportunities for learning, and adjusting to this lifestyle will come up. Communication connectivity is just one of many areas.
Do go have some fun, and again take your time and ease into things along the way!! Drive safe, have fun,