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My phone bill totaled up to £33.30 and it's usually £8.20, customer service says I have sent messages abroad even though I never did. I'm worried that the phone bill will be that high again. Any advice or answers?
When the phone has been used for a call or messaging service, it is logged against the IMEI of the phone, Vodafone billing is usually accurate. The best thing to do is to go through your online account, all outgoing will be itemised.
Also, take a look at any possibility that someone has been able to use your phone.
Until the next bill is produced and available online any charges at the time will be unbilled and Vodafone will ask you to wait until you have the bill to query the charges.