Activation Lock is an anti-theft system for Apple devices meant to prevent unauthorized usage or erasure. It's available on most Apple products, such as iPhones, iPads, Macs, and Apple Watches.

Apple has further consolidated resources on how to turn off Activation Lock on iPhone, iPad, or iPod touch on a new portal page linking to all support avenues that users can access.

For a used iPhone, ask the original owner to ... Authentication to secure your Apple Account on iOS 11 or later, disable ...