what is lock screen on iphone ?

The Lock screen exists in between states-when your iPhone or iPad is no longer asleep, but is also not yet open and fully functional. It can protect your device from unintended access and actions by a simple slide to unlock gesture, by a 4 number pin-code, by a strong alpha-numeric password, or - on the iPhone 5s - Apple's Touch ID fingerprint identity scanner. Unless or until you get past the Lock screen, there's very little you can do with an iPhone or iPad ...Answer