They already have a list of LTE bands that will work depending on if you buy the Europe or US variant. That list is only for the Gemalto PLS8-US and PLS8-E. There is another Broadmobi BM818 module as well.
For the US, AT&T, Verizon, and T-Mobile support the 2, 4, 5, and 17 LTE bands that work with the PLS8-US.
All of Europe should be supported on the PLS8-E.
The BM818 mention doesn't specify which version. On the FCC's website, there is a manual that lists bands 2, 4, 5, and 17 so at least it will work in the US.
When buying any sort of unlocked phone, you usually have to check all of the bands with your carrier just in case. When you buying a phone from a carrier, they have already done all of the work for you in terms of checking compatibility.