The modem known as the Sprint 3G/4G USB Modem U300 will use the new 4G Clearwire network with download speeds between 2 Mbps and 4Mbps where that network is available.
And when users are out of range of the 4G wireless network, they will automatically be able to access Sprint's 3G network, which offers average downloads of between 600 Kbps and 1.4 Mbps, according to Sprint.
Sprint launched the 4G WiMax network called Xohm in Baltimore in October, just months before it officially merged its WiMax network with Clearwire's network. The service will be launched in other markets across the country throughout 2009.
And because the 3G and 4G radio frequency technologies aren't integrated in these laptops, the devices would not seamlessly switch between the 3G and 4G networks.