Description InPhonic keeps the phone calls flowing. The company sells wireless services and devices through private-label Web sites that it creates and manages. The company's technology platform provides outsourced activation services for wireless telecommunications providers. Its portals allow wireless users to sign up for services, upgrade services, and configure their wireless devices. In addition, InPhonic offers wireless telecommunications providers a wide range of professional services, including application development, billing, and customer relationship management. Chairman David Steinberg owns a quarter of the company; Technology Crossover Ventures controls 30%.