I like the 3x3 grid swipe pattern for unlocking my phone because it's a lot quicker and more error free than typing in a password. Unfortunately it's not very secure according to research at the University of Pennsylvania . . . Attack reads smudges to retrieve Android password patterns ? The Register The smudge pattern is easily retrievable to figure out how to unlock the phone. I tried this on my own phone and it could clearly be seen! It seems like a simple improvement would be for Android to displace the pattern at random every times it's displayed - move it higher, lower, to the side, or change size a little. I don't want to go back to passwords - any other suggestions?