What is an IMEI and what can it tell me?¶

An IMEI identifies a handset's cellular-network equipment. It can link physical hardware to network and documentary records, but it does not identify the subscriber or human user.

Use the IMEI to follow the handset¶

Providers may record an IMEI when a subscription connects, allowing investigators to compare which SIMs or network identities used the same handset at relevant times. It may also connect the item to purchase, repair, insurance, prior recovery or packaging records. Multi-interface devices can have more than one IMEI.

Record the exact value and source: device settings, label, packaging, provider return or specialist acquisition. Apparent agreement between sources strengthens device identity, while differences require explanation.

Keep the association time-specific¶

The same handset can be shared, sold, stolen or used with different subscriptions and accounts. A provider event establishes an association for the recorded connection, not necessarily before or afterwards. Altered, absent or misreported identifiers are also possible.

Combine IMEI evidence with SIM or subscription records, possession, accounts, location, communications and other evidence of use. IMSI identifies the subscriber identity, so it answers a different part of the linkage.