How to use : 5G/4G LTE Smartphones

This guide describes settings that must be configured on Smartphones or Tablets for use overseas and how to use these devices.

Before departing

  • 1

    Confirming Data Charge subscription status

    • This step is not applicable to povo1.0 users, and UQ mobile users subscribing the 5G compatible plan.

    To use the au Unlimited Data Overseas, you must be subscribed to Data Charge. (Free)

    Check your subscription status and apply by clicking the button below.

  • 2

    Turn your device's international settings on [1]

    (1) Using data communications

    • Check "データローミング(Data Roaming)".
    1. When subscribed to Data Charge, you will not incur any data communications charges at your travel destination until you push "利用開始(start services)".

    <If necessary> Airplane Mode setting

    If necessary, set your device to Airplane Mode during your flight.

    (2) Making calls and using SMS

    • It automatically switches to overseas mode.
    • There is a case where the setting is required depending on the model. See the user manual for more information.

After arriving

  • 1

    From the settings, check that "Data Roaming" is set to on.

  • 2

    Once you have arrived abroad, you be notified via SMS of whether or not you can use the au Unlimited Data Overseas service. This SMS notification is sent free of charge.

    By clicking the URL in the SMS notification, your browser is launched and the "start service" screen is displayed. If using the Overseas Smartphone Usage application, the "start service" screen is displayed by starting the app.

    • No charges incurred for the SMS you receive.
    • When subscribed to Data Charge, you will not incur any data communications charges until you push "利用開始(start services)"

    Turn Wi-Fi off to display the "start services" screen.

    • If you do not receive an SMS, launch your browser and enter the URL directly.
  • 3

    Push the "start services" button

    Turn Wi-Fi off to display the "start services" screen.


    You should now be able to use.

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