Clearwire has been slowly building up its WiMAX wireless network around the country, starting with small markets and moving to big ones. But with Verizon Wireless almost ready to launch its competing LTE service, which will reportedly reach The high-speed wireless service will be offered by Clearwire under its "Clear" brand and by Sprint, which owns a majority stake in Clearwire. It will also be offered by partners Time Warner Cable in New York and by Comcast in San Francisco.