For older devices on iOS 9.3.6, specific "Checkm8" based tools can sometimes remove the Setup.app file, which is responsible for the lock screen.
Apple offers a web portal where you can request an unlock. You will need proof of purchase (original receipt) and the device’s serial number or IMEI. 2. DNS Bypass (The Quick "Soft" Bypass) ios 9.3.6 activation lock bypass
: If you have the Apple ID, you can sign in to iCloud Find Devices and select "Remove This Device" to clear the lock instantly. How to remove Activation Lock - Apple Support For older devices on iOS 9