well the nice thing about the 8800 is that it has the ability to use both cdma and gsm networks so as long as your telco has raoming agreements with the telcos out there it should work... that being said i have not been to those parts of the world dont know who verizon has agreements through...
i would think for sure the 8830 will tell you what network it is using (1x/EVDO/EDGE etc) and also you can probably go to the options->network section to see whos tower your connected to.
someone else who roams alot could maybe chime in to give their experiences.. as ive never done it and so what ive said is how it should work in theory
