When I was a kid my mother cautioned me about “answering questions not asked.” Well, I hope you’re not offended if I violate that rule. 
Here’s what I’d do: The SOHO is an excellent product (and we have several in use), but I’d first take a look at a dedicated, “non-cobbled-up” solution – https://www.peplink.com/products/max-cellular-router/single-cellular/#br1. When one takes such an approach there are fewer devices to “talk” to each other and fail. And, less “clunky.” More importantly, the Pepwave devices such as you see on the referenced data sheet are made to do cellular – external antenna jacks (you’ll see far better coverage/range/speeds), and you’ll have vastly more “control” over how the 4G “behaves.” They can also hold one or more SIMs. Just take the SIM and stick it into the Pepwave box and place the Jetpack on a shelf somewhere. If I could not place a satisfactorily-working 4G dongle directly into the USB port of a SOHO I’d opt for a BR1 every time.
(I hope my mom is not mad at me for saying all of this … 
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