Have you done a sim swap?
http://swapmysim.o2.co.uk/or if sim is same size as old one, just use it.
If all new phone and sim and no previous contract, call cs
http://www.o2.co.uk/contactus
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.
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