What is IMEI?
A unique 15-digit number assigned to every mobile device, used by carriers to identify devices on the network and track them globally.
The IMEI (International Mobile Equipment Identity) is burned into your phone's hardware and persists across SIM card changes, factory resets, and software updates.
Privacy Risks
- Carriers log IMEI with every connection, creating a permanent device history
- Law enforcement uses IMEI to track devices
- IMEI links all SIM cards ever used in the device
- Stolen phone databases use IMEI for tracking
Changing IMEI
- IMEI modification is illegal in many countries
- Some devices allow IMEI changes through software
- Changing IMEI doesn't prevent other tracking methods
Practical Advice
- If you need a device that can't be linked to your identity, buy with cash in person
- A new SIM in an old phone is still linked via IMEI
- For high-security needs, use a dedicated device that's never been associated with your identity
- Consider using WiFi-only devices without cellular radios
Related Terms
Burner Phone
A prepaid mobile phone intended for temporary use and easy disposal, typically purchased with cash to avoid identity linking. Used for privacy-sensitive communications where the phone and SIM can be discarded after use.
IMSI Catcher
A device that impersonates a cell tower to intercept mobile phone communications and track the location of nearby devices.
MAC Address
A unique hardware identifier assigned to every network interface, which can be used to track devices across WiFi networks.
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