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 Account and password you used to set up your device or your device passcode. If you can’t remember your Apple Account, try signing in with an email address or phone number that you regularly use for Apple services.
Find out how to find your Apple Account or reset your Apple Account password.
If your device is owned by a business or educational institution, please contact your IT department or manager.
Remove Activation Lock on the web if a device is offline
For iPhone, you might be able to remove Activation Lock on the web even if your device isn't offline.
Go to www.iCloud.com/find.
Sign in to your Apple Account.
Select the device that you want to remove from iCloud.
Click Remove This Device.
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.