> I take the dumbphone with me, the phone with the apps simply never leaves the office

Presumably they mean a smartphone without "the apps"

TIL: Apparently, there are flip phones that support Waze: https://youtu.be/zbhIiCtAk34?si=Bc6TrBqCSQbqSUCN&t=194 Sunbeam F1 Pro

For a long time Google supported a J2ME version of Google Maps that worked on loads of dumb phones