@JumboZoom
wifi is completely separate from anything to do with O2.
If you've tried the usual off/on and resets, you need to get Apple to run diagnostics.
https://www.apple.com/uk/retail/geniusbar/
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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