Enter your 15-digit IMEI or serial number — instantly check Apple warranty, iCloud activation lock, carrier lock, and blacklist status for any iPhone, Samsung, Xiaomi, or Huawei device.
Comprehensive verification for the world's most popular phone brands
One query, complete device intelligence
Check if your device is under manufacturer warranty, remaining days, and AppleCare+ or Samsung Care+ coverage.
Verify Find My iPhone activation lock status (must be OFF) before buying any used iPhone or iPad.
Check SIM-lock status (Locked / Unlocked) and original carrier — AT&T, T-Mobile, Verizon, Sprint, and more.
Detect if the device was reported lost or stolen and is on the GSMA global blacklist database.
Original country, original carrier, activation policy, purchase date, color, storage, and model number.
Detect refurbished, cloned, or tampered devices (IMEI/hardware mismatch) — avoid counterfeit phones.
Trusted by 35M+ users worldwide
Get complete results in 3 seconds on average. Powered by our proprietary GSX API and global TAC database, we deliver the fastest IMEI checks in the industry.
Direct connections to Apple GSX, Samsung KNOX, and GSMA blacklist databases ensure every result is accurate and reliable.
IMEI queries are not stored or linked to personal identity. All checks use HTTPS encrypted transmission for maximum data security.
Supports devices from every country and region worldwide, covering Apple, Samsung, Xiaomi, Huawei, and 50+ phone brands.
Basic checks are always free. Premium reports start at just $0.10 per query. New users get free credits upon registration.
Free basic check — no signup required
Dial *#06# on your phone, or go to Settings → About Phone. The 15-digit number is your IMEI.
Type or paste the 15-digit IMEI (or serial number for Apple) into the form at the top of this page.
Within 3 seconds, view warranty, activation lock, carrier, and blacklist status in one clean report.
Your phone's unique digital fingerprint
An IMEI (International Mobile Equipment Identity) is a 15-digit unique number assigned to every mobile device at the factory. Just like a fingerprint or a car's VIN, each phone, cellular tablet, or smartwatch has one and only one IMEI that cannot be changed.
The core purposes of the IMEI include:
The IMEI is a 15-digit numeric code used for cellular network device identification. The Serial Number is a manufacturer-defined alphanumeric code used for warranty and after-sales service. Apple devices have both; Android devices primarily use the IMEI. On IMEICheck, you can query using either.
5 essential scenarios where an IMEI check saves you money
Check the IMEI to confirm the device isn't blacklisted, iCloud activation lock is OFF, and there's no carrier lock — avoid buying a "brick" or stolen device.
Check warranty status via IMEI to see if your device is still covered. In-warranty repairs are free; out-of-warranty repairs can be expensive.
Check SIM Lock status and original carrier to determine if your device qualifies for official unlocking — avoid wasting money on shady third-party "unlocking" services.
Compare IMEI query results (model, color, storage, origin) with the device's actual info to detect refurbished, modified, or counterfeit phones.
If your phone is lost, an IMEI check can confirm whether it's been activated or flashed by someone else. Report the IMEI to your carrier to blacklist it.
What those 15 digits actually mean
The IMEI consists of 15 digits divided into three parts:
For example, IMEI 358829565661661: TAC=35882956 (brand/model), SNR=566166 (device serial), Check Digit=1. Understanding IMEI structure helps identify fake or tampered IMEI numbers.
Check carrier lock and blacklist status for major US carriers
Check device status against national stolen phone databases worldwide
Each country maintains its own blacklist database. We recommend checking the blacklist status in the country where the phone will be used. The global GSMA database covers 200+ countries and regions.
Practical guides from the IMEICheck blog
Complete guide to the 15-digit IMEI number — structure, purpose, and how to check it.
Read more →The ultimate 2026 guide to safely buying a used phone — IMEI check, physical inspection, all steps.
Read more →What is an IMEI blacklist? How to check? What to do if your phone is blacklisted?
Read more →Must-check activation lock status before buying any used iPhone or iPad.
Read more →What info does an Apple GSX report include? How to verify iPhone authenticity via GSX?
Read more →Complete guide to unlocking iPhone on all carriers — official vs third-party methods.
Read more →Everything you need to know about IMEI checks
IMEI (International Mobile Equipment Identity) is a unique 15-digit number that identifies every mobile phone, tablet, or cellular device worldwide. It's like a "fingerprint" for your phone — used by carriers to identify valid devices and block stolen ones.
Yes. IMEICheck offers free basic checks (model, manufacturer, basic warranty info) for every device. Premium checks (full GSX report, detailed iCloud activation lock, comprehensive blacklist) cost as little as $0.10 per query with volume discounts.
Three reliable methods:
*#06# — the IMEI appears instantly on screenA "blacklisted" device was reported as lost, stolen, or has unpaid bills by the original carrier. Blacklisted phones cannot make/receive calls or use mobile data on most networks. Always check the blacklist status before buying a used phone to avoid being scammed.
Yes, IMEI checks are 100% legal. The IMEI is not personal data — it's a device identifier, like a VIN for a car. However, you should only check devices you own or are seriously considering purchasing.
Theoretically, the IMEI is written to the phone's baseband chip and cannot be changed. While illegal "IMEI changing" tools exist, modifying the IMEI is a criminal offense in most countries (including the US, UK, and EU) and can render the device unusable. An IMEI check can detect tampered devices.
Yes. Dual-SIM phones have a separate IMEI for each SIM slot (IMEI1 and IMEI2). We recommend checking both to ensure neither slot is locked or blacklisted.
iCloud Activation Lock is Apple's anti-theft mechanism — when enabled, the device cannot be activated without the Apple ID password. IMEI blacklist is a carrier-level block that prevents the device from making calls or using mobile data. They operate independently; we recommend checking both before buying a used iPhone.
IMEICheck connects to official databases in real time, so results reflect the current status. Warranty status, blacklist status, and other data are synced with official sources with no delay.
Yes. Any iPad or Apple Watch with a cellular module has an IMEI and can be checked. Wi-Fi-only iPads don't have an IMEI but do have a serial number, which can also be used to check warranty and activation lock status.