How to Unlock Your Cell Phone to Switch Carriers: What the FCC and the Industry Unlocking Rules Say
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How we wrote this: A plain-English summary of the FCC consumer guide on cell phone unlocking (last reviewed by the FCC January 14, 2025) and the CTIA Consumer Code for Wireless Service it references, checked October 29, 2026. Each carrier's own policy controls the details, so check your carrier's posted unlocking policy before you switch.
If you run a small business on a few company phones, or you just want a cheaper plan, the phone you already own can usually move with you. The catch is the lock: software that ties a phone to the carrier that sold it. Here is how the FCC explains it and what carriers have committed to.
What "locked" means
The FCC says many phones sold in the United States contain software that prevents them from being used on other carriers' networks, even when those networks are technically compatible. Locking can apply to physical SIM cards and eSIMs alike, and tablets and other mobile devices can be locked too.
Why phones are locked, per the FCC:
- Discounts and installment plans. Locked phones are often sold at a reduced price or on an installment plan, and they stay locked until the installments are paid or for a set period.
- Fraud prevention. Even a phone bought at full price may be locked for a short period, such as 60 days, to help prevent theft and certain kinds of fraud.
The FCC's rule of thumb: unless a phone was specifically sold as unlocked, it's probably locked, whether you bought it from a carrier, a store or a third party. When buying a new or used phone, ask.
Postpaid vs. prepaid
The FCC notes that carriers may have different unlocking policies for the two kinds of plans:
| Plan type | How it works | Unlocking, per the FCC |
|---|---|---|
| Postpaid | Billed after the month of service; often a credit check, sometimes a contract and early termination fee | Often shorter waiting periods before unlocking |
| Prepaid | Paid up front; usually no credit check; often a discounted or free phone | May stay locked to the carrier for longer |
If you owe your carrier money or are still under contract, it may not unlock the phone until the balance is paid or the contract terms are met.
The industry unlocking standards
The FCC points to unlocking standards that CTIA, the wireless industry association, adopted on February 11, 2014 and built into its Consumer Code for Wireless Service. Participants include all nationwide carriers and a number of regional ones, and they implemented the standards by February 11, 2015. The six standards:
- Disclosure. Each carrier posts a clear unlocking policy on its website.
- Postpaid unlocking. On request, carriers unlock devices (or give the information needed to unlock them) for customers and former customers in good standing, and individual owners of eligible devices, once the contract or financing plan is fulfilled or an early termination fee is paid.
- Prepaid unlocking. On request, carriers unlock prepaid devices no later than one year after initial activation, subject to reasonable time, payment or usage requirements.
- Notice. Carriers notify customers when a device becomes eligible, or unlock it automatically, without an additional fee. They may charge a reasonable fee to people who are not current or former customers.
- Response time. Within two business days of a request, carriers unlock the device (or start the request with the manufacturer), explain why it doesn't qualify, or explain why they need more time.
- Deployed military. Carriers unlock devices for deployed military personnel in good standing who provide deployment papers.
The FCC adds that participating carriers agreed not to charge existing or former customers an extra fee to unlock an eligible device. If your carrier isn't a participant, ask it directly about its policy.
How to unlock, step by step
- Find your carrier's posted unlocking policy on its website and check the waiting period for your plan type.
- Pay off any device installment balance or contract obligation that keeps the phone locked.
- Ask. The FCC says that once a phone is eligible, a carrier may unlock it automatically, send instructions on request, or do it in a store.
- Check compatibility before you buy the new plan (next section).
- Then port your number. Unlocking the phone and moving the number are separate steps; see our guide to porting a business phone number, and protect the account with a port-out PIN as described in our guide to SIM swap and port-out fraud.
Unlocked doesn't mean compatible
The FCC is clear that unlocking only removes the software block. Carriers use different frequencies and network technologies, so an unlocked phone may still not be technically compatible with another carrier's network. Check with the new carrier before switching.
The same goes for travel: whether your phone is locked or not, the FCC suggests checking with your carrier before an international trip, since networks differ by country. Voice calls might work while data or texting doesn't.
If something goes wrong
If your carrier won't unlock an eligible phone or doesn't respond, start with the carrier's customer service and its posted policy. The FCC's consumer guide offers a complaint option through its Consumer Help Center if the guide doesn't resolve your issue.