Every iPhone manufactured by Apple carries a unique 15-digit IMEI number — International Mobile Equipment Identity — embedded in the device's hardware. When a carrier sells an iPhone with a subsidized price or installment plan, it locks the device to its own network using this IMEI as the identifier. Unlocking an iPhone via IMEI removes this carrier restriction permanently, authorizing the device to accept SIM cards from any compatible network worldwide.
This is the only method Apple and carriers officially recognize as a permanent carrier unlock. Unlike SIM interposer devices, third-party software tools, or jailbreak-based approaches, an IMEI unlock modifies the carrier's authorization database so that Apple's activation servers acknowledge your iPhone as unlocked. The result persists through iOS updates, factory resets, and device restores.
To understand the distinction between the types of iPhone restrictions, it helps to know what IMEI unlock means and how it differs from screen lock removal, iCloud lock, or MDM restrictions. This guide focuses exclusively on carrier SIM unlock via IMEI — the process that allows your iPhone to accept any carrier's SIM.
The IMEI unlock method is compatible with a wide range of iPhone models across multiple generations. The following devices are supported:
iPhone 15, iPhone 15 Plus, iPhone 15 Pro, iPhone 15 Pro Max
iPhone 14, iPhone 14 Plus, iPhone 14 Pro, iPhone 14 Pro Max
iPhone 13, iPhone 13 Mini, iPhone 13 Pro, iPhone 13 Pro Max
iPhone 12, iPhone 12 Mini, iPhone 12 Pro, iPhone 12 Pro Max
iPhone 11, iPhone 11 Pro, iPhone 11 Pro Max
iPhone XS, XS Max, XR, X, 8, 8 Plus, 7, 7 Plus, 6s, and 6s Plus
The premium iPhone AT&T unlock service covers all these models for AT&T-locked devices. For other carriers, dedicated service listings are available through the main IMEI services order page.
If you own the newer iPhone 16 Pro Max and need unlock assistance, detailed guidance is available in the iPhone 16 Pro Max SIM unlock guide.
There are multiple approaches people attempt when trying to unlock an iPhone. Understanding why IMEI-based unlocking is the superior method requires examining the alternatives:
These small adapters sit between the SIM card and the iPhone's SIM tray, tricking the device into accepting foreign SIMs temporarily. They are not recognized by Apple's servers, frequently cause call quality issues, and stop working after iOS updates patch the underlying vulnerability.
Some apps claim to unlock iPhones without an IMEI code. In practice, no software application can modify Apple's carrier authorization servers, which is where the lock is actually stored. These apps are ineffective for carrier SIM unlock on any iPhone running iOS 12 or later.
You can request an unlock directly from your carrier, but eligibility requirements are strict. AT&T, for example, requires the account to be in good standing, the device to be paid off, and a specific period of active service. The process can take weeks and is frequently denied for prepaid devices.
A verified IMEI unlock service submits your IMEI to the carrier's official unlock database, resulting in an authorization that Apple's servers recognize. This method is permanent, works across all iOS versions, and requires no physical modification to your device.
Learn more about how to identify trustworthy services in our guide on how to avoid scams when choosing a SIM unlock service.
Locating your IMEI before placing an unlock order is essential. An incorrect IMEI will result in a failed unlock. Here are all available methods:
Go to Settings > General > About. Scroll down to find IMEI. Tap and hold to copy.
Open the Phone app and dial *#06#. The IMEI number appears on screen without needing to press call.
On iPhone models with a physical SIM tray, the IMEI is sometimes printed on the tray itself.
Connect your iPhone to a computer, open iTunes (Windows or macOS Mojave and earlier) or Finder (macOS Catalina and later), and click on the device serial number to toggle through available identifiers including the IMEI.
The IMEI is printed on the barcode sticker on the iPhone's original retail box.
Sign in to iCloud.com, navigate to Find My, and select your device to see its IMEI under device information.
For a comprehensive walkthrough of IMEI location methods across all iPhone generations, see our guide on how to find IMEI number on any phone.
The complete iPhone IMEI unlock process involves the following stages:

Before ordering, verify that your iPhone is indeed carrier-locked and determine which carrier holds the lock. Use the iPhone IMEI carrier lock check to get accurate information. You can also run an iPhone IMEI SIM lock check to confirm the SIM restriction status.

If you purchased a second-hand iPhone, verify that the previous owner's Apple ID is not still linked to the device. An active iCloud lock prevents use of the device regardless of carrier unlock status. Run an iPhone IMEI iCloud check to confirm the activation lock is off.

Beyond carrier unlock status, your iPhone's IMEI can reveal extensive information about the device's history and Apple-registered details. A full IMEI report is particularly useful when buying or selling a used iPhone. Available checks include:
The iPhone GSX full history report provides Apple's internal records including purchase date, sale region, activation history, and warranty status.
Verify the remaining warranty period through the iPhone IMEI Apple warranty check.
If the iPhone was previously enrolled in a Mobile Device Management program — common with corporate or school devices — the iPhone IMEI MDM DEP check will reveal this. MDM-managed devices require additional steps before they can be used freely.
Before purchasing a used iPhone, run the iPhone IMEI lost stolen check to ensure the device is not flagged in any lost or stolen registry.
Confirm whether an iPhone has already been unlocked through the iPhone IMEI unlock check.
Different carriers implement their lock systems differently. Here is an overview of carrier-specific considerations for iPhone IMEI unlock:
AT&T-locked iPhones are among the most commonly submitted for IMEI unlock. The AT&T unlock service for iPhone supports all iPhone models sold through AT&T in the United States, including both postpaid and prepaid variants.
T-Mobile offers a carrier-direct unlock program, but third-party IMEI services are faster for prepaid devices or accounts that do not meet eligibility criteria. Review the T-Mobile device unlock guide for specific requirements.
MetroPCS (now Metro by T-Mobile) devices follow T-Mobile's unlock policies. Detailed guidance is available on the MetroPCS unlock page.
If your iPhone was purchased from a carrier outside the United States, the IMEI services order page lists international carrier options organized by brand, carrier, and country.
For the broadest perspective on unlocking across all carriers and understanding how the process works end-to-end, our guide on how to unlock your phone from any carrier provides a complete framework.
Carrier unlocking an iPhone via IMEI is legal in the United States under the Unlocking Consumer Choice and Wireless Competition Act. This legislation explicitly protects consumers' rights to unlock their devices. In the UK, EU, Canada, Australia, India, and most other countries, carrier unlocking is recognized as a consumer right, particularly after the end of a contract period. The service provided by verified IMEI unlock companies — submitting your IMEI to carrier authorization databases — operates within the carrier's own systems and does not involve any circumvention of Apple's security mechanisms. This is why the unlock is recognized by Apple's activation servers and survives all iOS updates.
For a full explanation of why this service is reliable and legitimate, see our detailed overview of why EasySimUnlocker is the best service for unlocking your Apple iPhone.
Unlocking is legally protected in most countries including the USA, UK, EU, Canada, Australia, and India.
IMEI unlocks are recognized directly by Apple activation servers and remain permanent after iOS updates.
Frequently Asked Questions: Unlock iPhone Online via IMEI
A blacklisted iPhone — reported stolen or associated with unpaid carrier debt — cannot be unlocked through standard IMEI services. The iPhone IMEI blacklist check will confirm whether your device is clean.

Navigate to the unlock service that matches your iPhone's carrier and country. For AT&T USA iPhones, the AT&T premium iPhone unlock service is specifically designed for all AT&T-locked iPhone models.
Enter your IMEI number accurately on the service order page. Review all details before confirming. After payment, your order enters the processing queue. Track progress through the order tracking system.
Unlike Android devices, iPhones do not use an unlock code. Instead, Apple's servers are updated with your IMEI's unlock authorization. Once you receive email confirmation that the unlock is complete, apply it as follows:
For full detailed instructions including screenshots and carrier-specific notes, refer to the unlock instructions page .
