Motorola i560 Rugged Nextel Phone Announced - ecoustics.com
Nextel Motorola i530 Walkie Talkie Black Boost Mobile Flip Phone | eBay
Throwback Tech: Old school cell phones - Electronic Products
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... :