Settings app -> Lock screen -> Screen lock type -> Enter your pin -> PIN -> re-type your PIN to use as the "new" pin, and tick the "Confirm PIN without tapping OK" checkbox. Continue and re-type your pin again. It'll auto confirm, and then your lock screen will automatically unlock once you enter the correct PIN.
I think some of us may not know about this, so I came up with this. (Am I the only one?LOL!)
I hope it helps for who don't know about. Thank you.
