: Use the Apple ID recovery page to reset your credentials.
The easiest way is to enter the Apple ID and password originally used to set up the device. If you've forgotten them:
If you have the original purchase receipt, Apple can remove the lock for you for free. How to remove Activation Lock - Apple Support
Most websites claiming to offer a "universal unlock file" for iOS 15.3 are fraudulent.
: Use the Apple ID recovery page to reset your credentials.
The easiest way is to enter the Apple ID and password originally used to set up the device. If you've forgotten them:
If you have the original purchase receipt, Apple can remove the lock for you for free. How to remove Activation Lock - Apple Support
Most websites claiming to offer a "universal unlock file" for iOS 15.3 are fraudulent.