IMEI & serial basics
What IMEI, serial, MEID, EID and TAC numbers are — and how to read them.
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How to Check Phone Warranty by IMEI or Serial Number (iPhone, Samsung, Pixel and More)
Check warranty by IMEI or serial for iPhone, Samsung and Pixel: official tools, what results mean, transfers and region limits. Verify before you buy.
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What Is an IMEI Number? Everything You Need to Know (2026)
What is an IMEI number? Learn what the 15 digits mean, how networks use the IMEI to block stolen phones, and why you sh…
How to Find the IMEI Number on Any Phone (Even Without the Phone)
How to find the IMEI number on any iPhone or Android: dial *#06#, check Settings, the SIM tray or box — or find it onli…
IMEI vs Serial Number vs MEID vs EID: What’s the Difference?
IMEI vs serial number vs MEID vs EID explained: what each phone identifier is, who assigns it, where to find it and whi…
How the IMEI Check Digit Works (Luhn Algorithm) + Free Calculator
Learn how the IMEI check digit is calculated with the Luhn algorithm, step by step with a real example, then validate a…
What Is a TAC Code? Decoding the First 8 Digits of an IMEI
What is a TAC code? Learn how the first 8 digits of an IMEI identify the brand and model, what the reporting body digit…
How to Decode an Apple Serial Number (Old and New Formats)
Decode any Apple serial number: read the factory, year, week and model code in 12-character serials, and learn why 2021…
Why Your Phone Has Two IMEI Numbers (Dual SIM & eSIM Explained)
Why does your phone have two IMEI numbers? Learn how IMEI and IMEI2 work on dual-SIM and eSIM phones, how the EID fits …
iPhone Model Number Explained: A-Number vs Part Number (MXXX LL/A)
iPhone model number explained: what the A-number and the part number (like MXXX LL/A) mean, how to read the first lette…
Samsung Model Numbers & CSC Codes Explained (SM-S928B, U, N, E…)
Samsung model numbers and CSC codes explained: decode SM-S928B style names, the B, U, U1, N and E suffixes, firmware st…
Can You Change a Phone’s IMEI? The Law, the Risks and the Truth
Can you change a phone’s IMEI? Learn where IMEI changing is illegal, why people try it, why it rarely works and how to …
iPhone Activation Status Explained: Activated, Not Activated, Replaced
iPhone activation status explained: what Activated, Not Activated, estimated purchase date, replaced, replacement, demo…
How to Read an Apple GSX-Style Report: Every Field Explained
Learn how to read an Apple GSX-style report: sold by, purchase country, coverage, case history, replacement, activation…