Unlocking your iPhone is one of those fundamental tasks you perform countless times a day. While you might know how to delete a wallpaper, clear your iPhone's cache, or back up your iPhone ...

But first, it's essential to know how to unlock an iPhone without a passcode, either for yourself or someone else—and ...

Currently, if you have a smart door lock, you typically have to tap a button on your iPhone or Apple Watch to unlock it, or physically tap your device against the lock for NFC implementations.