Log into your My O2 and select the option to "Bring in other products"
Follow the on screen instructions and both accounts will be under one log in from there on.
Note, it is not possible to reverse this process so only do it if you are sure you want them linked permanently.
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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