1990's MOTOROLA Nextel i370XL Cellphone walkie-talkie - cell phones - by owner - electronics sale - craigslist
Nextel i1000, i1000plus Compatible Leather Case lcnext1000ps - Nextel Accessories
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... :
That annoyed BEEP BEEP from NEXTEL phones in the 90s (sound in comments) : r/nostalgia
Nextel Launches the Motorola i850 Camera Phone
Direct PTT i800 Smart PTT Device. Two Way Cellular Radio Hybrid With Full GPS Tracking & Global Coverage. | Eventtone