Clearwire has unveiled its new prepay WiMAX service, called Rover. Launching in all of Clearwire’s 49 US markets, the service costs US$5 a day, US$20 a week or US$50 a month for unlimited use of the company’s high-speed wireless service. To date the WiMAX service has only been available via contract plans. Clearwire is targeting 18 to 24 year olds with the new prepay offering.