A locked phone only works with one carrier, meaning you cannot simply swap in a new SIM card and switch networks. An unlocked phone, by contrast, is free to connect to any compatible provider. If you are shopping for a new device, switching carriers, or buying a refurbished iPhone, understanding the difference between locked and unlocked is one of the most important steps you can take.
In this guide, we break down what locked and unlocked really mean, walk through the unlock process at every major U.S. carrier, and explain the FCC rule that now guarantees your right to unlock within 60 days.
Table of contents
- What is a locked phone?
- How to unlock a phone
- How long does it take to unlock a phone?
- Why do carriers lock phones?
- What are eSIMs?
- Is it legal to unlock a phone?
- Should I unlock my iPhone?
- How to check if your iPhone is unlocked
- Save money with a refurbished unlocked iPhone
- FAQ
What is a locked phone?
A locked phone is a device tied to a single carrier or network provider (for example, T-Mobile, Verizon, or AT&T). When a phone is locked, it will reject SIM cards from other networks, even if the hardware is technically compatible. An unlocked phone removes that restriction, letting you use it on any carrier that supports the device's radio bands.
It is worth noting that a small number of phones still have hardware-level incompatibilities with certain networks. However, most modern smartphones, including every iPhone sold since the iPhone 12, support all major U.S. carriers as well as a wide range of international networks. If you have a locked Android phone or a locked iPhone, unlocking it is straightforward.
In 2024, the FCC finalized a rule requiring all carriers to unlock phones within 60 days of activation, free of charge. The process must be simple and consistent across providers, and many carriers will now unlock your phone even sooner if you meet their eligibility criteria.
How to unlock a phone
Unlocking a phone is not the same as unlocking the lock screen. It involves removing the carrier restriction so the device can accept SIM cards from other networks.
The fastest approach is to go directly to your carrier's official website or app. Most providers handle unlock requests through an online form where you enter the phone's IMEI number (dial *#06# on any phone to find it) along with a few account details. The carrier then processes the request and sends a confirmation.
Below is a step-by-step guide for the three largest U.S. carriers.
T-Mobile
T-Mobile requires that the device has been active on the network for at least 40 days and is fully paid off. Once eligible:
On Android:
- Open Settings on your phone.
- Navigate to the network or connections section. On Samsung devices, the path is: Settings > Connections > More Connection Settings > Network Unlock.
- Tap Permanent Unlock and wait for the process to complete.
On iPhone:
Contact T-Mobile through chat, phone, or the T-Mobile app to submit an unlock request. T-Mobile will process the request and notify you once the unlock is applied, typically within two business days.
Verizon
Verizon automatically unlocks most devices 60 days after purchase, provided:
- The device is fully paid off or the installment agreement is current.
- The phone has not been reported lost, stolen, or flagged for fraud.
No action is required on your part. If 60 days have passed and the phone still appears locked, contact Verizon support to resolve the issue.
AT&T
- Visit the AT&T device unlock page.
- Confirm that you meet AT&T's eligibility requirements (device paid off, active for at least 60 days, no past-due balance).
- Select Unlock your device and enter your IMEI number. If you do not know it, dial *#06# on your phone.
- Provide your AT&T phone number and follow the remaining prompts.
- AT&T will process the request and send a confirmation, usually within one to three business days.
How long does it take to unlock a phone?
The timeline depends on your carrier. Under the FCC's 60-day rule, every carrier must offer unlocking no later than 60 days after the device is activated. In practice, the actual processing time once you submit a request ranges from a few hours to several business days. T-Mobile and AT&T typically complete requests within one to three business days, while Verizon handles it automatically.
If your phone is already past the 60-day mark and you have met all payment obligations, the carrier is required to process the unlock promptly.
Why do carriers lock phones?
Carriers lock phones for a simple financial reason: high-end smartphones cost hundreds of dollars, and carriers often subsidize part of that cost through installment plans or promotional credits. Locking the phone discourages customers from taking the subsidy and immediately switching to a competitor.
In practice, the installment contract already binds you financially, and the FCC's 60-day unlock requirement has significantly reduced the lock-in period. Locking has become less relevant than it once was, though carriers continue the practice as a safeguard against fraud and early termination.
What are eSIMs?
An eSIM (embedded SIM) lets you activate a cellular plan without inserting a physical SIM card. The chip is built directly into the phone, and you activate it by scanning a QR code or entering a carrier's activation details in your device settings.
eSIMs offer several practical advantages:
- Dual-line capability: Run two phone numbers on one device, which is useful for separating work and personal lines or adding a local data plan while traveling abroad.
- Faster carrier switching: Activate a new plan in minutes without waiting for a physical SIM to arrive.
- More space for hardware: By removing the SIM tray, manufacturers can use that space for a larger battery or improved components.
Apple moved to an eSIM-only design for all U.S. models starting with the iPhone 14 in 2022. International models still include a physical SIM slot alongside the eSIM. Android flagship phones from Samsung, Google, and others have also adopted eSIM support widely, with some models offering dual eSIM capability.
One important note: an eSIM-only phone can still be carrier-locked. The lock applies at the software level, not to the physical SIM card itself. If you buy an eSIM-only iPhone from a carrier on an installment plan, you will still need to unlock it after 60 days.
Is it legal to unlock a phone?
Yes, unlocking your phone is completely legal in the United States. The FCC requires carriers to unlock devices free of charge once the phone is paid off and the 60-day activation period has passed. This rule applies to all major carriers and MVNOs.
That said, if you are still under a contract or installment plan, leaving your carrier early may trigger early termination fees or require you to pay off the remaining device balance. The unlock itself is free; the cost, if any, comes from breaking the service agreement.
Should I unlock my iPhone?
Unlocking your iPhone is one of the easiest ways to get more value from the device. Here is why it matters:
- Travel freedom. An unlocked iPhone works with carriers worldwide. Pick up a local SIM card or activate an eSIM plan when you land in another country, and avoid expensive roaming charges altogether.
- Carrier flexibility. An unlocked device lets you switch to a better plan whenever one becomes available, whether that means moving to a cheaper MVNO or a carrier with stronger coverage in your area.
- Higher resale value. When it comes time to sell or trade in, unlocked iPhones consistently sell for more than their locked equivalents because they appeal to a broader pool of buyers.
- No cost involved. Unlocking is free once your phone is eligible. There is no downside, and you lose nothing by requesting it.
You can also check Apple's official unlocking guide for additional details.
How to check if your iPhone is unlocked
Checking your iPhone's lock status takes less than a minute:
- Open the Settings app.
- Tap General.
- Tap About.
- Scroll down to Network Provider Lock (on older iOS versions, this may appear as Carrier Lock).
If you see No SIM restrictions, your iPhone is fully unlocked and compatible with any carrier. If the status indicates a lock, contact your carrier to request an unlock. Remember, they are required to do it free of charge once you have met the eligibility requirements.
Save money with a refurbished unlocked iPhone
One of the smartest ways to get an unlocked iPhone at a lower price is to buy refurbished. A refurbished iPhone has been professionally inspected, tested, and restored to full working condition, delivering the same performance as a brand-new model at a significant discount.
Most refurbished iPhones from reputable sellers come already unlocked, which means you can use them with any carrier from day one. On RefurbMe, you can compare prices across multiple trusted refurbishers, all of which offer a warranty, and find the best deal on the exact model you want.
Browse unlocked iPhones and start comparing prices:
FAQ
Can I unlock a phone that is still being financed?
In most cases, you need to pay off the remaining balance before the carrier will process an unlock request. Some carriers may allow an early unlock if you pay the device in full, but the standard requirement is that all installment payments are complete.
Does unlocking a phone void the warranty?
No. Unlocking a phone through your carrier is an officially supported process and does not affect your manufacturer warranty or any AppleCare coverage.
Will an unlocked phone work with any carrier?
An unlocked phone will work with any carrier whose network bands are compatible with the device's hardware. Nearly all modern iPhones and flagship Android phones support all major U.S. carriers (T-Mobile, Verizon, AT&T) as well as most international networks.
What is the difference between a locked phone and a blacklisted phone?
A locked phone is tied to a specific carrier but is otherwise in good standing. A blacklisted phone has been reported as lost or stolen, which means carriers will refuse to activate it on their networks regardless of its lock status. Always verify a phone's IMEI status before purchasing a used device.
Can I unlock my phone myself without contacting the carrier?
The official and recommended method is always through your carrier. Third-party unlocking services exist, but they carry risks, including potential scams, voided warranties, or temporary unlocks that revert after a software update. The safest route is to contact your carrier directly, especially since the unlock is free once you are eligible.
Last updated: Mar 16, 2026 · First published: Oct 20, 2023
