@BP10
Wifi may drop out occasionally.
To avoid using data in these circumstances, you should turn off mobile data in your phones settings.
Also check if you have wifi assist turned on as this can also use data if the wifi signal is weak or slow.
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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