It's no accident that Apple chose a yellow icon for its walkie-talkie feature. I dug out my old (2002ish) Nextel with PTT (push to talk). It was all the rage back then... :
Nextel i880 - Review 2007 - PCMag UK
Nextel Launches the Motorola i850 Camera Phone
Remember When Phones Were Walkie Talkies? - YouTube
Michael Fisher on Twitter: "Looking at these 2004 spots with 2021 eyes is wild. The hustle-fetish is pretty toxic in retrospect, and a dick joke in a national ad? 😂 But the
Direct PTT - The Nextel T320 is the full package. This model is a Smart- Radio with PTT & 2-Way Manage your entire fleet from your palm with full GPS Tracking and Mapping.