As Sprint (NYSE:S) prepares to expand its 4G footprint beyond Baltimore, it is tweaking its product portfolio to take advantage of the enhanced speeds of Clearwire’s WiMax network. It has begun selling dual-mode WiMax-EV-DO versions of Novatel’s MiFi personal hotspot and the business-targeted CradlePoint wireless broadband router, both of which redistribute capacity from mobile broadband connections to multiple WiFi devices. more