IMEI Checker — Check Phone Compatibility

Find out if your phone works with any carrier. Use your IMEI number to check compatibility before you switch.

How to Find Your IMEI Number

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Dial *#06#

Open your phone app and dial *#06#. Your IMEI number will display immediately — no call is made.

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Check Settings

iPhone: Settings → General → About → IMEI
Android: Settings → About Phone → IMEI

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Check the Box

Your IMEI is printed on the original box, on the SIM tray, or on a sticker under the battery (older phones).

Check Compatibility by Carrier

Use each carrier's official tool to verify your phone works on their network before switching.

T-Mobile Check compatibility → Verizon Check compatibility → AT&T Check compatibility → Mint Mobile Check compatibility → Visible Check compatibility → US Mobile Check compatibility → Cricket Wireless Check compatibility → Boost Mobile Check compatibility →

What is an IMEI Number?

IMEI stands for International Mobile Equipment Identity. It's a unique 15-digit number assigned to every mobile device in the world. Think of it like a serial number — no two phones have the same IMEI.

Carriers use IMEI numbers to identify devices on their network. When you switch carriers, the new carrier checks your IMEI to confirm your phone is compatible with their network bands, isn't reported stolen, and isn't carrier-locked to a competitor.

Phone Compatibility: What to Check

  • Network type — T-Mobile and AT&T use GSM; Verizon uses CDMA/LTE. Most modern phones support all three.
  • Band support — your phone must support the carrier's LTE/5G frequency bands for full coverage.
  • Lock status — a carrier-locked phone only works on that carrier's network (and its MVNOs).
  • Blacklist status — phones reported lost/stolen are blocked from activation on all US carriers.

Unlocked vs Locked Phones

An unlocked phone works with any compatible carrier — maximum flexibility. Phones from Apple.com, Samsung.com, Google Store, or Best Buy are typically unlocked.

A locked phone is tied to the carrier that sold it. To unlock, you usually need to pay off the device in full and contact the carrier. Most carriers unlock phones after 60 days of active service.

Frequently Asked Questions

What is an IMEI number?
IMEI (International Mobile Equipment Identity) is a unique 15-digit number assigned to every mobile phone. It identifies your specific device and is used by carriers to check compatibility, track stolen phones, and activate service.
How do I find my IMEI number?
The easiest way is to dial *#06# on your phone — the IMEI will display on screen. You can also find it in Settings > About Phone > IMEI (Android) or Settings > General > About > IMEI (iPhone). It's also printed on the SIM tray or original box.
Why do I need to check my IMEI?
Checking your IMEI before switching carriers confirms your phone is compatible with the new network, isn't reported lost or stolen, and isn't locked to another carrier. This prevents activation issues and ensures your phone will work properly.
What does "unlocked" mean?
An unlocked phone isn't tied to a specific carrier. It can be used with any compatible network. Phones bought directly from Apple, Samsung, or Google are typically unlocked. Carrier phones can be unlocked after paying off the device or meeting the carrier's unlock policy requirements.
Can I use a locked phone with an MVNO?
Only if the MVNO uses the same network as the carrier your phone is locked to. For example, a T-Mobile-locked phone will work with T-Mobile MVNOs like Mint Mobile or Tello. For full flexibility, unlock your phone first by contacting your current carrier.
What if my IMEI is blacklisted?
A blacklisted IMEI means the phone was reported lost, stolen, or has unpaid financial obligations. Blacklisted phones cannot be activated on any US carrier. If you bought a used phone with a blacklisted IMEI, contact the seller for a refund. You can check the status at swappa.com/esn or through the carrier directly.