As you say, your thumb is on the front of the phone already. You just slide it up on the screen as you look at it. So it's just a change from holding the thump on one particular spot, to sliding it up a little anywhere.
But some people find it easier to swipe up with another finger and not have to hold their thumb anywhere in particular at all. That's fine too.
last 2 phones I've had have had a fingerprint sensor on the back. Every time I pick it up, the phone is unlocked before my eyes hit the screen. Any kind of face unlocking just seems clunky in comparison
But some people find it easier to swipe up with another finger and not have to hold their thumb anywhere in particular at all. That's fine too.