Cellular One is a trademarked brand name, which is in use by several service providers in mobile telephony in America and Bermuda. It was earlier owned by AT&T. Trilogy Partners in 2008 purchased the brand. Cellular One was formed back in the year 1977 and it was a collaboration of the efforts of Motorola and American Radio Telephone Service. Today Trilogy licenses to brand name to independent wireless providers in America as well as Bermuda. The company is so well in vogue that their website alone attracts more than 45,000 visitors every month. Their current licensees operate in Montana, Wyoming, Texas, Arizona, Oklahoma, Illinois, New Mexico, Pennsylvania and Louisiana as well as Bermuda.