Change verification phone number

[Frippyyy]

I'm on a joint account with my siblings and im over 18 and am trying to change the parental controls for my account but when I try to it send the verification code to one of their numbers and not my one

[Bambino]

@Frippyyy See if anything in this guide helps: O2 Age restriction: what it is & how to manage it ... - O2 Community

[Breanna]

Were you able to get this sorted @Frippyyy?