@Smiffy1861
How to here https://www.o2.co.uk/help/device-and-sim-support/apple-watch
Basically, just follow the setup routine to add a data plan from the watch app on your phone.
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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