Just arrived - the SureCall TriFlex2Go mobile boosters.www.PowerfulSignal.com sent us the Verizon LTE and AT&T LTE versions.
The claim for this product is that it's higher end than the Wilson Mobile 4G. We'll be testing to find out just what exactly that means, and if the price point is worthwhile.
(the 5-band Wilson Mobile 4G retails for ~$350, the TriFlex2Go ~$600)