This is a first for Verizon, a USB data modem with Global Roaming, and if the the people over at
Cellphonesignal are correct, this could be right around the corner. The device is said to be manufactured by
ZTE and will work with Verizon's CDMA EVDO network in the U.S. and GSM/UMTS 850/1900Mhz networks thanks to the pre-installed SIM card. Most other details are left out, such as if EVDO will be Rev 0 or Rev A and if you can use other SIM cards than the included Verizon/Vodafone.
source:
Cellphonesignal
Things that are NOT allowed: