But first, it's essential to know how to unlock an iPhone without a passcode, either for yourself or someone else—and possibly even save a life. After discovering this, you might also want to ...

If your iPhone has a Home button with Touch ID, simply press it using the finger you registered during setup. The device will ...

or the phone belongs to someone else who has forgotten the passcode (or died, if so read: How to unlock an iPhone, iPad or Mac when its owner passed away)? Perhaps you have found an old iPhone in ...