How to reset backup passcode

[AC Question]

MY BACKUP PASSCODE is lost and need to reset it, have been told I can not do it. I TRIED MY FINGERPRINT, which has been working fine for 6 weeks that I have the phone. But now it did not recognize the PRINT and I DO NOT KNOW MY BACK UP PASSCODE HELP

 

[Javier P]

Take the phone and personal ID to your carrier. They should be able to help you out.