Wiktionary
flip phone
alt. (context dated English) A mobile telephone with a hinged top that is flipped open when the phone is in use. n. (context dated English) A mobile telephone with a hinged top that is flipped open when the phone is in use.
Usage examples of "flip phone".
If her friend's phone was tapped, and whoever was after them had the technology, it seemed possible that the frequency of her flip phone could be a trail of sorts.
As they approached the elevators, Sven drew a flip phone from his jacket.
Nearly growling with impatience, he withdrew from everyone's earshot and drew a flip phone from his tuxedo jacket.