When I look at my unbilled charges, there are a number of charges for data. The amounts themselves are also a little inconsistent - there is one for 63.8MB totalling $1.01 but another for only 5.5MB totalling $2.22.
I have not been roaming overseas (and probably not on Vodafone either).
I called the contact centre, who confirmed the unbilled charges. They said this 'might' be an error, but that they can't do anything about it until after I am actually billed.
Has anyone else noticed this? Salty, do you have any ideas?