1990's MOTOROLA Nextel i370XL Cellphone walkie-talkie - cell phones - by owner - electronics sale - craigslist
Motorola+I355+Rugged+Nextel+Cell+Phone+Walkie+Talkie+Radio for sale online | eBay
I560 NEXTEL OR BOOST MOBILE PHONES
Direct PTT i655D Two Way Global Network, Analog & DMR All In One Global PTT Radio | Eventtone
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... :
Motorola Nextel i355 Direct Talk - Walkie Talkie PTT | eBay
Nextel Launches the Motorola i850 Camera Phone
That annoyed BEEP BEEP from NEXTEL phones in the 90s (sound in comments) : r/nostalgia