Can you use an eSIM on a locked iPhone?

Many eSIM sellers say any iPhone that supports eSIM will work. That is only true for an unlocked iPhone. A carrier lock is a rule set by the carrier that sold the iPhone, usually while you still owe money on it. The iPhone compares the carrier on the eSIM with the carrier it is locked to, and it only activates when they match.

What works and what does not

• Works: an eSIM from the carrier the iPhone is locked to, such as moving your own line to eSIM.
• Does not work: an eSIM from a different carrier, a travel eSIM or a prepaid eSIM from another provider.
• Works after unlocking: any eSIM from any carrier, as long as the iPhone model supports eSIM.

How to check if your iPhone is locked

Our guide to checking if your phone is unlocked shows more ways to check, including with a different SIM.

How to unlock your iPhone for any eSIM

Only the carrier that locked the iPhone can unlock it. Most carriers unlock an iPhone when you have paid it off or finished the contract, and some after a set number of days on their network. Ask the carrier, follow their steps, and wait for the confirmation. After that, restart the iPhone and check Carrier Lock again. Our guide to unlocking an iPhone from a carrier explains the process.

Traveling with a locked iPhone

If your iPhone is locked and you are going abroad, a travel eSIM will not work. Instead, use your own carrier's international option, such as a day pass or an international plan, or buy a local SIM only after the iPhone is unlocked. Wi-Fi calling can also keep you in touch on hotel Wi-Fi. See using your iPhone in Europe for options.

Buying a used iPhone? Check the lock first

A locked iPhone can look the same as an unlocked one, and the lock decides which eSIM it can use. Before you pay, check Carrier Lock in Settings and confirm it says No SIM restrictions. Also check that your iPhone model supports eSIM, which you can do in our guide to which iPhones support eSIM.

What carrier lock means for eSIM

A carrier lock ties the iPhone to the carrier that sold or financed it. On a locked iPhone you can usually add an eSIM from that same carrier, but not from another network. That is why a travel eSIM or a cheaper plan from a different company fails to activate. Locked is about the carrier, not about the SIM type, so a physical SIM from another carrier fails in the same way.

Brands that run on your carrier's network

Some prepaid brands use the network of a bigger carrier. Visible runs on Verizon, Cricket on AT&T and Metro on T-Mobile, so a phone locked to the parent carrier may work with its brand, depending on the carrier's rules and whether the phone is eligible. Ask the new brand to check your IMEI before you switch. Our guide to checking carrier compatibility explains how.

What the error looks like

When a locked iPhone rejects an eSIM, you may see a message that the eSIM cannot be added or that the plan cannot be activated, or the plan may install but never connect. The wording varies by iOS version and by the company selling the eSIM. If you see this, check the lock status in Settings › General › About, where Carrier Lock should say No SIM restrictions on an unlocked iPhone.

If the carrier will not unlock it

Carriers usually unlock a phone once it is paid off and has been active for a set time, and they must follow their own rules. If your request is refused, the phone may still be on a payment plan, reported lost or stolen, or too new. Ask for the exact reason and the date it will be eligible. Steps for each case are in how to unlock an iPhone from a carrier. If you buy a used iPhone, check the lock before you pay with how to know if a phone is unlocked.

Is it worth unlocking before you travel?

If you often travel, unlocking your iPhone can save real money, because local data eSIMs are usually far cheaper than roaming from your home carrier. Ask your carrier to unlock it a few weeks before the trip, since some requests take days, and make sure the phone is paid off first. If you cannot unlock in time, use Wi-Fi, a day pass from your own carrier or a physical SIM from a local shop on a phone that accepts them.