Yes, It has my Sprint 598U modem in it (via USB.) It routes wireless G to the entire home. The odd part is the BB's are faster using the Sprint wireless G via WiFi than their own AT&T wireless G. I found that odd... But I think AT&T is "overloaded" in the Los Angeles area... Clearly they are faster on the wireless N but that was to be expected.
Here is a link about Cradlepoint and their various 3G routers... 3Gstore.com, Mobile Broadband Made Easy. CradlePoint Routers, MiFi, Antennas, Amplifiers and Verizon & Sprint EVDO Modems.
Click where it says "3G routers."