How to remove activation lock using IMEI number?

click here ➜ How to remove Activation Lock - Apple Support

Activation Lock can’t be removed using an IMEI number. It’s tied to the Apple ID that was used to set up the device.

The only ways to remove it are:

• Signing in with the original Apple ID and password, or
• Having the previous owner remove the device from their account (via iCloud)

If that’s not possible, you’d need to contact Apple Support with proof of purchase.

Do you have access to the original Apple ID, or was this device bought second-hand?