@contatc2
When roaming, O2 rely on the roaming network to send back the data usage. Quite often this is delayed by a few days.
The only way to get an accurate up to date reading is to reset the data counter 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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