# IMEI
> An IMEI is a unique identity number for a mobile device.
Topics: Smartphones, Connectivity
Difficulty: Everyday
Aliases: International Mobile Equipment Identity
Updated: 2026-06-26T08:00:00.000Z
## Go deeper
An IMEI is a unique identity number for a mobile device. 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.