What does MEID mean in Telecom?

Mobile equipment identifier

A mobile equipment identifier is a globally unique number identifying a physical piece of CDMA mobile station equipment. The number format is defined by the 3GPP2 report S.R0048 but in practical terms it can be seen as an IMEI but with hexadecimal digits. An MEID is 56 bits long. It consists of three fields, including an 8-bit regional code, a 24-bit manufacturer code, and a 24-bit manufacturer-assigned serial number. The check digit is not considered part of the MEID. The MEID was created to replace ESNs, whose virgin form was exhausted in November 2008. As of TIA/EIA/IS-41 Revision D and TIA/EIA/IS-2000 Rev C, the ESN is still a required field in many messages—for compatibility, devices with an MEID can use a pseudo ESN, which is a manufacturer code of 0x80 followed by the least significant 24 bits of the SHA-1 hash of the MEID.

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