Buying Guides

Here's the fastest way to check whether your iPhone is carrier-unlocked: open Settings → General → About, scroll to Carrier Lock, and read the value. If it says "No SIM restrictions," your iPhone is unlocked — done, 30 seconds, no phone call required.

But the Settings screen is only one of four ways to check, and each one catches a different situation. If you're buying a used iPhone, for example, the on-screen setting alone isn't enough — a seller can hand you a phone that shows unlocked today but has an unpaid installment balance lurking behind it. We sell phones for a living and check lock status dozens of times a week; here's the exact sequence we use, from fastest to most thorough.

Method 1: The Settings check (30 seconds)

On iOS 14 and later, Apple built the answer directly into the phone:

Settings → General → About → Carrier Lock.

You'll see one of two things:

• "No SIM restrictions" — the iPhone is unlocked. It will accept any carrier's SIM or eSIM.
• A carrier name (e.g. "AT&T" or "T-Mobile") — the iPhone is locked to that carrier.

Two caveats. First, this screen needs a network connection to be accurate — if the phone was just restored or updated, restart it and check again. Second, it tells you the lock status right now. It doesn't tell you whether the phone has an unpaid balance that could get it blacklisted later. That's why methods 3 and 4 exist. For a quick refresher on what "locked" and "unlocked" actually mean, our factory unlocked vs carrier locked guide explains the difference.

Method 2: The SIM swap or travel eSIM test

The oldest test in the book still works: put a SIM from a different carrier in the phone. If it connects, the phone is unlocked. If you see a "SIM Not Supported" error, it's locked.

One catch — you can't do this on recent US iPhones, because Apple removed the physical SIM slot in the US starting with the iPhone 14. The iPhone 18 Pro and Pro Max are eSIM-only in 12 countries, and the iPhone Duo is eSIM-only worldwide. On these phones, use the eSIM equivalent of the test instead: try adding a cheap prepaid travel eSIM from a different carrier (they cost a few dollars). If it activates, the phone is unlocked. If it errors out, it's locked.

This test only works on phones that can actually hold two carriers — if the phone you're testing is your only line, borrow a friend's SIM or a spare prepaid eSIM. And always power-cycle the phone after the swap before drawing conclusions.

Method 3: Check with the carrier

The Settings screen is instant, but the carrier's own records are authoritative — especially if you're buying used and want to know whether the original carrier still considers the phone theirs. Most carriers let you check status with just the IMEI:

• AT&T: submit a request at the device unlock portal — it shows whether the phone qualifies. Postpaid phones need 60 days active and must be paid off; prepaid needs 6 months of paid service. Many recent phones unlock automatically once eligible, and requests typically resolve within 48 hours.
• T-Mobile: check in the My T-Mobile app or account — eligible devices (postpaid, 40+ days active, paid in full) unlock remotely and automatically. Prepaid needs 365 days or $100+ in refills.
• Verizon: check in My Verizon. Note the January 2026 rule change: Verizon no longer unlocks phones automatically 60 days after activation. Postpaid phones now unlock automatically once the device balance is paid in full (prepaid: 365 days of active service). Phones activated before January 27, 2026 are grandfathered under the old 60-day rule.

Last updated: October 13, 2026. Carrier policies change — confirm on the carrier's site before acting.

If you're the owner and the phone qualifies but still shows locked, the most common fix is simple: pay off the balance, wait 24–48 hours, restart the phone. Carriers process unlocks in batches.

Method 4: The IMEI check (for used-phone buyers)

This is the one that matters most at the counter. Every iPhone has a 15-digit IMEI (find it at Settings → General → About, or dial *#06#). An IMEI lookup reveals what the Settings screen can't:

• Which carrier the phone was sold through — and whether it's still locked to them
• Whether it's been reported lost, stolen, or blacklisted
• Warranty and model information

What it doesn't reliably reveal: whether there's an unpaid installment balance. A phone can pass an IMEI check today and get blacklisted next month if the original buyer stops paying. That's the one risk no free check fully removes — buy from someone with a paper trail (receipt, original owner account release) and you shrink it to near zero.

Run the IMEI through a reputable checker before handing over money. Our own imei.ae service runs these checks daily — it's the same lookup we use on our own trade counter.

The red flags: walk away if you see these

In order of how often we see them:

• The seller won't share the IMEI before you meet. No IMEI, no deal. This is the single biggest predictor of a problem.
• The Settings check shows unlocked, but the price is suspiciously low. Could be a phone with an unpaid balance heading for blacklisting.
• Activation Lock (iCloud lock) is on. Different thing from a carrier lock — a phone signed into someone else's Apple ID is a brick without their password. Never buy one.
• "SIM Not Supported" on a phone sold as unlocked. The seller either misunderstood or is lying. Either way, you now know.

Frequently asked questions

How do I know if my iPhone is unlocked without another SIM card?

Open Settings → General → About and look at Carrier Lock. "No SIM restrictions" means unlocked. Alternatively, run an IMEI check online — no second SIM needed.

Does "No SIM restrictions" mean my iPhone is factory unlocked?

Effectively, yes — the phone will accept any carrier right now. The difference between "factory unlocked" and "carrier-unlocked after paying it off" only matters for resale: a carrier-unlocked phone with an unpaid balance can still be blacklisted if the original owner defaults. Our factory unlocked vs carrier locked guide walks through it.

Can I check if an iPhone is unlocked with just the IMEI number?

Yes — IMEI lookups show the carrier lock status plus lost/stolen/blacklist flags, which is why they're the standard check for used-phone buyers. Ask the seller for the IMEI before you meet; a refusal is a red flag.

Why does my iPhone still say locked after I paid it off?

Carrier unlocks process in batches, usually within 24–48 hours after the balance clears. Restart the phone and recheck. If it's still locked after 48 hours, contact the carrier — AT&T and T-Mobile let you submit or re-trigger unlock requests through their portals.

Does carrier unlocking remove the iCloud Activation Lock?

No — they're completely separate. A carrier unlock only frees the phone from its network restriction. Activation Lock ties the phone to the owner's Apple ID, and only the owner can remove it. Never buy a used iPhone that's still signed into someone else's Apple ID.