An IMEI number is a unique, 15-digit identifier assigned to every legitimate mobile device. A common visual format looks like 49-015420-611351-7, where the first two digits represent the Reporting Body Identifier and the remaining groups represent the TAC, FAC, and Serial Number.
Understanding the 15-Digit IMEI Number Format
The following digit is the Serial Number, which distinguishes your specific unit from others of the same model. Checking both sources allows you to verify that the digital match matches the hardware, ensuring the device has not been tampered with.
Finally, the last digit is a check digit, calculated using the Luhn algorithm to verify the authenticity of the entire number. This is often the most reliable source for verifying a brand new phone.
Understanding the 15-Digit IMEI Number Format
The sequence is always exactly 15 digits long and contains no letters or special characters, only numerical values from 0 to 9. The next six digits represent the Final Assembly Code (FAC), which often corresponds to the specific manufacturing location or batch.
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