Last time I changed my passcode, I put the new code in 1Password. The only problem with that process was that I didn't actually enter what I thought I had. A case of my mind moving faster than my fingers. I rebooted my phone to test the new passcode. And sure enough, I was met with the not correct passcode; failed attempt 1 message. Tried two more times to the same message. Looked back at 1Password and realizsed that my saved password was 2 digits off from what had been entered. After a total of 5 attempts, I was good to go. Needless to say, I changed the code again to make sure it matched my 1Password entry. Good thing the attempt threshold was higher, as I did not want to have to head to the Apple store and show proof of purchase etc. to get it unlocked.