Actually, not to get to deep in the weeds but PTT was part of IDEN which traces it’s roots back to 1987 or earlier and was a specialized radio band. Here’s some interesting history on Nextel who was the major driver of this service at least in my part of the world for years and is now part of soft bank / sprint.
https://en.wikipedia.org/wiki/Nextel_Communications <https://en.wikipedia.org/wiki/Nextel_Communications> > On Sep 12, 2016, at 11:31 PM, Simon Fogarty <si...@blinky-net.com> wrote: > > Sounds like push to talk which was afeature of cdma devices back in the day. > > Sent from my iPhone 6S+ > > On 13/09/2016, at 8:45 AM, Shawn Krasniuk <bbssh...@icloud.com > <mailto:bbssh...@icloud.com>> wrote: > >> Roger is a good app. It supports Bluetooth and if you use it without >> Bluetooth, you can talk without holding a record button. >> >> Shawn >> Sent From My White MacBook >> Facebook Username: Shawn Krasniuk >> Twitter Handle: shawnk_aka_bbs >> Skype username: bbstheblindrapper >> Facetime: bbssh...@icloud.com <mailto:bbssh...@icloud.com> >> >>> On Sep 12, 2016, at 10:50 AM, Todor Fassl <fassl....@gmail.com >>> <mailto:fassl....@gmail.com>> wrote: >>> >>> I need a blutooth walkie-talkie app for my iPhone. There is only like a >>> million of them on the app store. 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