Use your PIN, pattern, password, or biometric unlock if you remember it
Try your device’s official account recovery option
Use Find My Device or Find My iPhone to erase and reset the phone
Visit the phone manufacturer’s official support page for recovery steps
Contact your mobile carrier for account and device assistance
Take the phone to an authorized service center with proof of ownership
Perform a factory reset using the official recovery mode if you are locked out
Restore your data from a backup after resetting the device