[ElevenLathe]

This market is pretty well covered by Zoom etc al.

Nextel used to eat well off the PTT feature of their phones. IIRC the stickiest users of that seemed to be more blue collar folks -- construction crews, tow truck drivers, etc. I assume this is because they tended to be in environments where typing was harder and hands were otherwise engaged? It was also before widespread deployment of touch screens, so it was more competing with T9 or a full phone call than a 2024-style text message.