Similar to the BlackBerry Storm, the Niagara will sport EV-DO Rev. A for super, high-speed wireless here in the United States, as well as quad-band GSM/EDGE and unspecified HSDPA support for data and voice connectivity overseas. Also like the Storm, it will lack Wi-Fi, meaning it can only connect via cellular networks and not free Wi-Fi hotspots.
This radio configuration is what I think is most interesting for the Niagara. It will be the latest smartphone that business customers can use both in the U.S. and abroad, just as those used by AT&T and T-Mobile customers. It means that Verizon has acknowledged the limits of its CDMA-based network here in the United States. Business users who buy CMDA-only smartphones won't be able to use them when they travel to Europe, and will be forced to use other solutions. Verizon recognizes this and is making sure its top-of-the-line smartphones can cater to the enterprise in the best way possible. That means being able to work in Europe.
None of this has been confirmed by RIM or Verizon, of course, but the specs are a good start and make sense given RIM's current line up of devices.