Central Equipment Identity Register

The Central Equipment Identity Register is a database of the IMEI numbers of blacklisted handsets. If a device's IMEI number is listed on CEIR, it is supposed not to work on any service provider.

The most common usage of the CEIR is with stolen cellphones. Once an user reports the operator about the theft, the cellphone' IMEI number goes to CEIR, supposedly making the device unusable in any network (although this not always works, see information on IMEI's page).