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      0120-959-472(Toll Free)

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      0120-959-473(Toll Free)

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    • Korean

      0120-959-478(Toll Free)

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      0120-933-961(Toll Free)

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      about au mobile services

      157(Toll Free)from au phones

      0077-7-111(Toll Free)

      about Internet services
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I want to confirm an unknown charge on my bill

First, please check the details of the billing amount on My au  and the usage history of au PAY.

  • The number of Spam e-mails pretending to be au or KDDI are increasing. Please confirm if the content is not suspicious.

Checking the breakdown of charges on My au

If there is an unknown charge, the following 4 points can be considered. Tap on the item that applies to check the details.

au Easy Payment

Please check if the free usage period has ended for the services used in the past and if there are any usage charges. 

Call Charges

  1. Even if you subscribe to the unlimited calling plan, there are destinations for outgoing calls such as the number information service (104) which are not eligible for free calls. Please check if you did not make a call to a not eligible party for free calls.
  2. Additionally, calls details (per call) and data transmission details (per day) can be confirmed from the Calls Details Statement.
    • To view call details, you must apply (free of charge) for the Calls Details Statement.

Installment Payment

Please check if there is still any installment amount left for devices etc.

Unknown phone number

Phone numbers are also assigned to tablets and data transmission devices (router). Please check if you have not contracted with them. 

How to verify your au PAY usage history

If you checked but it was not your use, or in case of any concerns

Feel free to contact us via Message Support. We will be able to check your concerns accurately and answer your questions.

  • You can contact us at any time and any place.

  • You can also send us a screenshot of the screen.

  • Message service is 24/7 and online advisors reply from 10:00 to 19:00.

You can contact us by message (text message) from the My au app.

  • All of the indicated amounts exclude tax unless otherwise specified.