Sprint says it expects to begin phasing out iDEN in 2013. Sprint will shift the PTT (push-to-talk) service for which the technology is famous to its CDMA network. iDEN became popular among business users and in blue-collar fields such as plumbing and construction. Nextel’s PTT had a big edge in quality, at least while other carriers were still using 2G (second-generation) cellular networks. The network has already outlived that commitment by three years, even as its users have fled in large numbers.”]
Source: https://www.csoonline.com/article/2126172/sprint-s-iden-finally-headed-for-sign-off.html