A phone which can be opened and closed with a hinge has which name?

I had a flip phone a long time ago and loved it. Now they’re advertising them again recently.

These acted as a built in screen protector for your phone, which was useful. However, phones were really only used for calls and occasional texts back then - they weren't a nuisance on those "dumb phones"

It's STILL a flip phone! Who writes these questions?