Thank you very much for all of your input and expertise. Appreciate it. based on this discussion I'm 99% sure the Verizon specific variant (BBB100-3 US V2) WILL work in Europe on a GSM network, and 98% sure that the BBB100-1 US V1 would work on Verizon where I have LTE and 3G coverage. Of course, it's those remote rural areas that may not have LTE or 3G coverage where one would really need a mobile phone...so there's that factor to consider.

If a KeyOne owner has actually taken their phone to Europe and was successful in using it there on the GSM networks (via one of Verizon's International Plans...not using a separate SIM) I'd appreciate a comment so I can move up to 100% confidence

thanks!