Eventually , Sprint launched its new nationwide CDMA network , then in 1999 sold the decommissioned GSM infrastructure to Omnipoint which re-launched in May 2000 .
Although the current Sprint PCS service is CDMA , the original Washington - area network used GSM .
Sprint PCS launched Sprint PCS 's new nationwide CDMA network , then in 1999 sold the decommissioned GSM infrastructure to Omnipoint which re-launched in May 2000 .
Although the current Sprint PCS service is CDMA , the original Washington - area network used GSM .