Slated for phase-out in 2010, there were questions about what was going to happen to the Nextel iDen network that provides rapid push-to-talk functionality. According to this post on Engadget, the US Department of Defense is going to buy the iDen infrastructure to provide a secure push-to-talk service for DOD employees. Sprint is currently working on enhancing its push-to-talk over CDMA technology.
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