What Is an IMEI? Structure and How to Use It When Checking a Device

An IMEI is an international mobile equipment identity, usually 15 digits. The TAC identifies the model type; the next digits identify the individual unit; the last digit is a Luhn check digit.

Dual-SIM phones (or eSIM + nano-SIM) typically have two IMEIs because each radio path needs its own identity. When checking a device, record both and match them against the box label.

• Identify a device on a cellular network.
• Cross-check Settings / box labels when buying or selling.
• Some Android brands look up warranty by IMEI.
• Apple Check Coverage prefers the serial number — do not substitute an IMEI unless the portal says it accepts both.

Yes. An IMEI can be cloned or altered on some devices. Always cross-check Settings, *#06#, the box label, the returned model and the receipt.

When buying used or receiving a lot, put this term on your checklist: get the right code → read Coverage → match the model → then pay. See also IMEI vs serial and by-model checks.

If you live in spreadsheets, pair this with the Batch IMEI Checker for Excel.

A common mistake is calling a device “clean” just because Coverage returns OK. Coverage does not replace an on-device Activation Lock check, and it does not report carrier blacklists. Separate layers reduce the risk of taking unsellable units.

Knowing the term prevents wrong conclusions from a single Coverage line. Return to the full glossary, browse comparisons, or open BatchIMEI for bulk checks.

Suggested reading order: glossary basics → concept comparisons → by-model guides → Excel workflows for stores. Each step answers a different buyer or intake question.