Found this copied below from an old post. If you have a credit card this
one seems to work well:Going to https://ageverification.o2.co.uk/
Following OFCOM regulation, all O2 sim cards come with age restriction
turned on.The customer or user must be a...
Age verification link on the 'more' menu item currently redirects you to
nothing relevant to age verification. Bit rubbish.Thankfully your link
re credit card worked so thanks.This should be far simpler and in My O2
screen somewhere obvious.Seems com...