How to remove Activation Lock
Find out what to do if you see the Activation Lock screen on your device, or if you're asked to remove Activation Lock on a device that's offline and not in your possession.
Remove Activation Lock on the device
Follow the onscreen steps to enter the Apple ID and password you used to set up your device or your device passcode. If you can’t remember your Apple ID, try signing in with an email address or phone number that you use regularly for Apple services.
Remove Activation Lock on the web if a device is offline
Go to www.iCloud.com/find.
Sign in with your Apple ID, email address or phone number, and enter your password.
Select the device that you want to remove from iCloud.
Click Remove from Account.
Start a support request
If you need help with removing Activation Lock and have proof of purchase documentation, you can start an Activation Lock support request.