Mobile devices are identified by unique codes known as MEID (Mobile Equipment Identifier) and IMEI (International Mobile Equipment Identity) numbers. While both serve as distinct identifiers for mobile devices, they have specific characteristics that differentiate them.

IMEI (International Mobile Equipment Identity):

IMEI numbers are unique 15-digit codes used to identify GSM, WCDMA, and LTE mobile phones and devices globally. These codes contain information about the device’s origin, model, and serial number. IMEI numbers are commonly used by network operators to track and authenticate devices.

MEID (Mobile Equipment Identifier):

MEID numbers, similar to IMEI, are also unique identifiers assigned to mobile devices. They consist of 14 digits and are primarily used in CDMA networks. MEID numbers were introduced to replace ESN (Electronic Serial Number) due to limitations in the number of available codes.

Key Differences:

1. Length: IMEI numbers are 15 digits long, while MEID numbers consist of 14 digits.
2. Compatibility: IMEI numbers are used in GSM, WCDMA, and LTE networks, whereas MEID numbers are primarily used in CDMA networks.
3. Structure: IMEI numbers have a specific structure, whereas MEID numbers follow a modified structure derived from the IMEI format.
4. Regulatory Bodies: IMEI numbers are overseen by the GSM Association, while MEID numbers are managed by the Telecommunications Industry Association (TIA) in the United States.

Usage and Significance:

IMEI and MEID numbers both serve the purpose of uniquely identifying mobile devices. However, their primary usage differs based on the type of network and geographical location. IMEI is more commonly used globally, while MEID is predominantly utilized in CDMA-based networks, especially in North America.

While both MEID and IMEI numbers are crucial for identifying mobile devices, their primary distinctions lie in their length, structure, and network compatibility. Understanding these differences is essential for network operators, manufacturers, and regulatory bodies to ensure proper device management and authentication across various network standards.