@John391
What exactly are you trying to do.
You've mixed 3 possible scenarios in your post.
unlocking Guide: Unlocking an O2 phone to use a different SIM card
PUK https://www.o2.co.uk/help/device-and-sim-support/unblock-your-phone
Screen lock PIN (depends on phone type) - Google is the best way to find answers.
I have no affiliation whatsoever with O2 or any subsidiary companies. Comments posted are entirely of my own opinion. This is not Customer Service so we are unable to help with account specific issues.
Please select the post that helped you best and mark as the solution. This helps other members in resolving their issues faster. Thank you.
