Originally Posted by
potfish
You didn't misunderstand; I clearly do. Took me a while but are you using the GSM acronym to refer to a set of frequencies?
Not only frequencies - in the US we actually have two completely different mobile systems - GSM (like most of the world uses) and CDMA (used by two of the largest networks here). A CDMA 3G adapter won't work on a GSM network. The only possible exception are the new GOBI adapters that do CDMA and GSM. Verizon does offer a USB GOBI adapter, but not on prepaid.