WHAT IS ESN,MEID ?
A mobile equipment identifier (MEID) 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.
Regional codeManufacturer codeSerial numberCD
R R X X X X X X Z Z Z Z Z Z C
An MEID is 56 bits long (14 hex digits). It consists of three fields, including an 8-bit regional code (RR), a 24-bit manufacturer code, and a 24-bit manufacturer-assigned serial number. The check digit (CD) 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 (pESN), which is a manufacturer code of 0x80 (formerly reserved) followed by the least significant 24 bits of the SHA-1 hash of the MEID.
Your device identifier (i.e. MEID, ESN, IMEI) can be used to check with a device's carrier (e.g. Verizon, T-Mobile, Sprint, AT&T) to check if the device is "clean" (not reported lost or stolen) and not tied to an account in bad standing.
ESN, MEID, and IMEI are all codes used by manufacturers to uniquely identify each device. Each device will generally have one MEID or ESN or IMEI.
Your device identifier can be found via Android's settings: Settings > About Phone > Phone Identity | Status > MEID (or similar)
More information:
- ESN (Electronic Serial Number).
- MEID (Mobile Equipment Identifier).
- IMEI (International Mobile Equipment Identity).
Your device identifier (i.e. MEID, ESN, IMEI) can be used to check with a device's carrier (e.g. Verizon, T-Mobile, Sprint, AT&T) to check if the device is "clean" (not reported lost or stolen) and not tied to an account in bad standing.