Free Technician Utility for Mobile Repair Centers

Free IMEI Validator & Luhn Check Digit Tool

Verify mobile phone IMEI numbers, calculate missing check digits, and inspect TAC components. 100% client-side execution with zero data storage.

100% Private & Client-Side. No IMEI data is sent to or stored on any server.
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Type or scan barcode. If 14 digits are entered, the 15th check digit will be calculated automatically.

Automated Intake

Tired of manually typing customer IMEI numbers?

TamamFlow scans barcodes, validates device IMEIs on intake, prints thermal stickers, and tracks warranty history automatically.

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Frequently Asked Questions About IMEI Validation

An IMEI (International Mobile Equipment Identity) is a unique 15-digit number identifying GSM, LTE, and 5G mobile devices. It consists of an 8-digit TAC (Type Allocation Code), a 6-digit serial number, and a final Luhn check digit.
The Luhn algorithm (mod 10) doubles every second digit starting from the right. If doubling results in a number greater than 9, its digits are added together. The sum of all digits must be a multiple of 10 for the IMEI to be mathematically valid.
Yes, it is 100% safe. This tool runs entirely in your web browser using JavaScript. No IMEI data is ever transmitted across the internet, logged, or saved to any database.
Dial *#06# on any smartphone keypad to instantly display the IMEI barcode and number, or check the device settings menu and physical SIM tray.