Hi Mutt,
The device is called a CDMA wireless data terminal and is not locked to a provider.
For example in Indonesia, there seem to be 2 cdma handphone service providers that have a joint venture with Indosat, the actual ISP. So I bought a Starone CDMA sim card separately (about $3.50) and use that in the data terminal. (comes with earphones and mic for voice calls but haven't tried that yet)
Won't work in Australia cos Telstra shut down the CDMA network last month!
Cheers
Octane