You don't have to guess, the post you're replying to showed 11% of users had 123...

		kalleboo on March 18, 2015 \| parent \| context \| favorite \| on: Apple iOS Hardware Assisted Screenlock Bruteforce You don't have to guess, the post you're replying to showed 11% of users had 1234 as their PIN, and has a detailed analysis of common patterns, such as birth years and PIN pad patterns (2580). You should read it, it's interesting.