Clearwire on Wednesday began shipping its 4G mobile routers first introduced last month. Either is available online or in stores, and let users share their WiMAX data connection wirelessly with up to eight compatible devices on the Spot 4G and as many as five with the Spot 4G+. The Spot 4G can only support WiMAX networks, however, while the Spot 4G+ gets both it and Sprint's 3G network access.
