IMEI Check Blog
Plain-English guides to help you check any phone before you buy — blacklist and stolen-device lookups, carrier and SIM-lock checks, and safe used-phone tips.
Best Free IMEI Check Before Buying a Used Phone (2026 Checklist)
Before you pay for a used iPhone or Android, run these free IMEI checks. A step-by-step buyer checklist for blacklist, carrier lock and iCloud status — and what to do if a phone is flagged.
Comparisons6 Free imei.info Alternatives (2026)
imei.info is the best-known IMEI lookup, but it is ad-heavy and paywalled for the data that matters. Here are six free alternatives — including our own — that cover blacklist, carrier and lock checks.
Comparisons7 Best Free IMEI Checkers in 2026 (Tested & Compared)
We tested the most popular free IMEI checkers side by side — what each one shows for free, what costs money, and which is best before buying a used phone.
ComparisonsBest IMEI Check Websites: Free vs Paid Compared
Free IMEI checks show the model; paid ones reveal blacklist, carrier and lock status. Here is exactly what each tier covers and when it is worth paying.
ComparisonsFreeIMEICheck vs imei.info: Which IMEI Checker Is Better?
A side-by-side comparison of freeimeicheck.online and imei.info — coverage, price, privacy and ease of use — to help you choose the right IMEI checker.
Buying SafetyHow to Check if an iPhone Is Blacklisted or Stolen by IMEI
Learn how to run a blacklist check on any iPhone using its IMEI, what a blacklisted device means, and how to avoid buying a lost or stolen phone.
How-ToHow to Find Your IMEI Number on Any Phone (iPhone & Android)
Five quick ways to find the IMEI on iPhone and Android — from the dialer code to Settings, the SIM tray, and the original box.
How-ToiPhone Carrier & SIM-Lock Check: What It Means and How to Verify
Understand the difference between carrier lock and SIM lock, why it matters when buying used, and how to verify an iPhone is factory unlocked.
GuidesWhat Is an IMEI Number and Why It Matters When Buying a Used Phone
A plain-English explainer on what an IMEI is, how it identifies your phone, and why checking it protects you from scams when buying used.
AndroidHow to Check a Samsung Phone by IMEI (Warranty, Knox Guard & Blacklist)
Run a Samsung IMEI check to see warranty status, Knox Guard lock, and blacklist status before you buy a used Galaxy phone.
AppleHow to Check if an iPhone Is iCloud Locked (Activation Lock)
Activation Lock can brick a used iPhone. Learn how to check iCloud lock status by IMEI before you buy, and what to do if it is locked.
Buying SafetyAndroid Phone IMEI Check: What to Verify Before Buying Used
Not just Samsung — check any Android (Xiaomi, OPPO, Huawei, Motorola) by IMEI for warranty, lock status and blacklist before you pay.
GuidesHow to Check if an IMEI Is Blacklisted (GSMA Guide)
A step-by-step guide to checking any IMEI against the global GSMA blacklist to avoid lost, stolen or carrier-blocked devices.
How-ToHow to Check iPhone Network Lock & SIM Lock Status
Verify whether an iPhone is network locked or factory unlocked, and why lock status matters for resale value and international travel.
Buying SafetyHow to Verify a Used Phone Is Not Stolen Before You Buy
A complete pre-purchase checklist: blacklist, iCloud lock, and IMEI checks that protect you from buying a stolen device.
AppleHow to Tell if an iPhone Is Refurbished or Used
Spot a refurbished, replaced or used iPhone before you buy — read the model letter, check warranty by serial, and confirm activation lock.
How-ToHow to Unlock an iPhone from Its Carrier
Learn whether your iPhone is carrier-locked, who is allowed to unlock it, and the safe steps to get a factory-unlocked device.
GuidesWhat Is a SIM Lock and Can You Remove It?
A plain-English explanation of SIM lock, why carriers use it, and the only safe way to remove it from an iPhone or Android.
How-ToHow to Check Any Phone’s Warranty by IMEI or Serial
Check warranty coverage on iPhone, Samsung, Google, Xiaomi and more before you buy used — by IMEI or serial number.
AndroidWhat Is Samsung Knox Guard and Why It Matters When Buying
Knox Guard (KG) is a remote lock on Galaxy phones. Learn what it does and how to check KG status before buying used.
GuidesiPhone vs Android: What an IMEI Check Reveals on Each
The same IMEI lookup returns different fields for iPhone and Android. Here is what to expect on each platform.
GuidesIMEI vs Serial Number: What’s the Difference?
Two identifiers, two purposes. Learn when to use an IMEI and when a serial number is required for a device lookup.
How-ToHow to Check If Your Phone Is Unlocked Before Traveling Abroad
Traveling soon? Confirm your phone accepts a local SIM before you fly — a quick lock check avoids expensive roaming fees.
Buying SafetyHow to Avoid IMEI Scams on Facebook Marketplace & Craigslist
Used-phone marketplaces are full of IMEI scams. Learn the red flags and the three checks that expose a bad deal.
AppleHow to Check a Mac by Serial Number Before Buying Used
Used Macs carry the same risks as iPhones. Check activation lock and warranty by serial before you pay for a second-hand Mac.
GuidesWhat Does a “Clean” IMEI Mean?
Sellers say “clean IMEI” — but what does it actually confirm? Understand what a clean status does and does not guarantee.
Buying SafetyHow to Verify a Second-Hand Phone Is Genuine (Not a Clone)
Clone and counterfeit phones are on the rise. Verify authenticity and status with a live IMEI lookup before buying.
AppleHow to Check iPhone Model & Specs by IMEI or Serial
Confirm the exact iPhone model, capacity and specs before you buy — decode the IMEI or look up the serial number.
AndroidGoogle Pixel IMEI Check: Warranty, Carrier & Blacklist
Run a Google Pixel IMEI check to see warranty coverage, original carrier and blacklist status before buying a used Pixel.
AppleWhat Is MDM Lock on iPhone and How to Check It
MDM (Mobile Device Management) locks tie a used iPhone to a company. Learn what MDM lock does and how to check it before buying.
GuidesCan You Check an IMEI for Free? Free vs Paid IMEI Checks
Basic IMEI identification can be free, but deep checks like blacklist and carrier need paid data. Here is what each covers.
Buying SafetyHow to Check If a Phone Is Reported Lost or Stolen
The global blacklist is the source of truth for lost and stolen phones. Learn how to check it and why it is not the only step.
AppleHow to Prepare Your iPhone for Sale: Remove iCloud & Verify Status
Selling your iPhone? Sign out of iCloud, erase it, and verify the lock is clear so the buyer gets a clean device.
GuidesWhat Is the TAC in an IMEI Number and How to Read It
The first 8 digits of an IMEI are the TAC (Type Allocation Code) that identifies the phone model. Learn how to read it.
GuideseSIM vs SIM Lock: Does eSIM Affect IMEI Checks?
eSIM phones are just as subject to carrier and SIM locks. Learn how eSIM interacts with IMEI checks and activation locks.
SellingHow to Check a Phone Before Selling It Online
Sellers need checks too: confirm the phone is not blacklisted, remove the lock, and know its value before you list it.
Buying SafetyBuying a Used Phone Internationally? Check the IMEI First
Cross-border used-phone deals carry extra risk. Learn why the IMEI check matters even more when buying from another country.
GuidesHow to Read an IMEI Report: A Beginner's Guide
IMEI reports contain device, carrier, blacklist and lock data. Learn what each section means and how to act on it.
AndroidSamsung Galaxy IMEI Check: Warranty, Carrier & Blacklist
Samsung Galaxy buyers need more than a model check. Learn how to verify warranty, carrier lock and blacklist status by IMEI.
AppleiCloud Locked iPhone: What It Means and How to Check
An iCloud locked iPhone is tied to someone else's Apple ID. Learn what that means for buyers and how to check before paying.
Buying SafetyHow to Spot a Fake iPhone Listing Online
Too-good-to-be-true prices and blurry photos are red flags. Learn how to spot fake iPhone listings before you lose money.
GuidesCarrier Lock vs Network Lock: What's the Difference?
Carrier lock and network lock sound similar but refer to different restrictions. Learn the difference before you buy.
GuidesIMEI Check for iPad and Tablet Devices
Tablets have IMEI numbers too. Learn how to check iPad and Android tablets for blacklist, warranty and carrier lock status.
Buying SafetyWhy You Should Check IMEI Before Buying a Refurbished iPhone
Refurbished iPhones can be great value, but not all are equal. Learn why the IMEI check is essential before you buy.
AndroidHow to Check IMEI on a Samsung Phone
Find your Samsung Galaxy IMEI using the dialer, settings, or the box. Then learn what to do with it before buying or selling.
GuidesSIM Lock Meaning and How to Remove It
A SIM-locked phone only works with one carrier. Learn what SIM lock means, why it exists, and how to get it removed.
Buying SafetyBuying a Phone on Facebook Marketplace? Check the IMEI First
Facebook Marketplace deals can be great, but scams are common. Learn how to use an IMEI check to protect yourself.
AndroidIMEI Check for Samsung Galaxy S Series: What to Look For
Galaxy S phones are popular used buys. Learn what an IMEI check reveals about warranty, carrier lock and blacklist status.
AppleiPhone 12, 13 & 14 IMEI Check: What to Verify Before Buying
Older iPhones are still great value. Learn what an IMEI check should confirm before you buy a used iPhone 12, 13 or 14.
Buying SafetyIMEI Check Before Buying a Phone on eBay
eBay has buyer protection, but disputes take time. Learn how to run an IMEI check before you buy a phone on eBay.
Buying SafetyHow to Use an IMEI Check on Swappa
Swappa verifies listings, but an independent IMEI check adds another layer of safety. Learn how to use it before buying.
Buying SafetyIMEI Check Before Buying a Phone on OfferUp
OfferUp is a local marketplace with less buyer protection. Learn how an IMEI check protects you when buying a phone there.
Buying SafetyIMEI Check Before Buying a Phone on Craigslist
Craigslist deals are cash-only and final. Learn how to use an IMEI check to avoid scams when buying a used phone.
UnlockingHow to Unlock an AT&T iPhone in 2026 (Step-by-Step + Eligibility)
Locked to AT&T? Here is exactly how to unlock your iPhone in 2026 — the free official method if you qualify, and what to do if you bought it used or don’t meet AT&T’s rules. Includes our remote IMEI unlock service.
UnlockingHow to Unlock a T-Mobile iPhone in 2026 (Requirements & Steps)
T-Mobile auto-unlocks eligible iPhones — but only after you meet its 2026 rules. Here is what qualifies, how the automatic unlock works, and what to do if you bought a locked T-Mobile iPhone used.
UnlockingWhat Is FRP Lock on Android? Factory Reset Protection Explained + How to Remove
FRP (Factory Reset Protection) locks an Android phone to the last Google account after a reset. Learn what it is, why it triggers, how to remove it legitimately, and when a professional FRP unlock service is the right call.
UnlockingCarrier Lock vs. Activation Lock: The Difference That Matters When Buying a Used Phone
A network-unlocked iPhone can still be iCloud-locked — and vice versa. Learn the difference between carrier (SIM) lock and Activation Lock, how to check both, and why it changes everything when you buy used.
Buying SafetyHow to Check If a Phone Is Unlocked Before You Buy It (iPhone & Android)
Don’t take the seller’s word for it. Here is how to verify a phone is carrier-unlocked on iPhone and Android before you pay — plus the IMEI and iCloud checks that protect you.