You can get an overview in the tariff section of your MyO2
http://www.o2.co.uk/myo2 or call customer services on 202 and they can give you an average of the last 3 months.
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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