with customer service seemed to be a large issue. Many customers claimed to have found themselves on hold via phone support for hours, only to be hung up on. Also, instances of mail-in rebates being "lost" or never fulfilled had been reported. Amp'd customer service was contracted to ClientLogic at launch. Support was later handled by Sento Corporation, but some time after the bankruptcy filing this support had ended, which had forced Sento to lay off around 200 people in Albuquerque, New Mexico and Orem, Utah. References External links Chapter11.epiqsystems.com Defunct mobile phone companies of the United States Bankrupt mobile phone companies Mobile virtual network operators Technology companies based in Greater Los Angeles Companies based in Los Angeles Telecommunications companies established in 2005 Technology companies disestablished in 2007 2005 establishments in California 2007 disestablishments in California Defunct companies based in Greater Los Angeles Companies that filed for Chapter 11 bankruptcy in 2007