You can check your Calls Details Statement on My au. (You can check your usage from the month you applied)
To check, you need to apply for the "Calls Details Statement Service" [通話明細サービス].
Please refer to the link below for the application.
For information on how to check call details on the web, please see below.
Enter the 4-digit PIN you set when you signed the contract and tap on "Next" [次へ].
The Calls Details Statement will be displayed.
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