# Foldable hinge
> A foldable hinge is the mechanical part that lets a folding phone open and close smoothly.
Topics: Smartphones
Difficulty: Everyday
Aliases: hinge, foldable phone hinge
Updated: 2026-06-26T08:00:00.000Z
## Go deeper
A foldable hinge is the mechanical part that lets a folding phone open and close smoothly. In everyday buying decisions, the useful question is not just what the spec says, but what it changes for comfort, cost, speed, safety, or battery life.