There will be a pop up on your screen asking that you reset your passcode. You will be able to do this right away or chose to do it later within the hour.
When you select “Change now”, you will get prompted to put in your current passcode:
Once you hit “Continue”, you will get prompted to put in a new passcode that is 8 or more characters for a new passcode:
Select “Continue”, you will get asked to put in the new passcode once more.
Once you click on “Set Passcode”, your passcode will now be the one you changed it to. Lock your screen and test your new code. If you selected just numbers your screen will look like this:
If you have numbers and letters your regular keyboard will be on the bottom.