【au World Service】What is World Data Flat?
World Data Flat is an international data roaming service that allows you to use smartphone in over 160 countries and regions overseas.
You can use it for 490 yen or 690 yen per 24 hours with advance reservation when in Japan, or for 980 yen per 24 hours without reservation.
You can start data transmission at the time you want to use it at your destination, and it will automatically stop when the end time comes, so you can use data transmission without any worries even overseas.
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For au customers
New reservations for World Data Flat have ended on March 15th, 2024. If you have made a reservation before March 15th, please see this page.
If you are using au Overseas Unlimited, please click here (in Japanese only)
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For UQ mobile customers
You can continue using World Data Flat after March 15th, 2024. Please see this page.
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Additional charges apply for voice calls and text message (SMS) overseas.
Reference
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For au customers
To use World Data Flat, you need to subscribe to Data Charge (free of charge). Please check your subscription status for Data Charge (free of charge) from My au. (Login with au ID is required)
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For UQ mobile customers
To use World Data Flat, you need to subscribe to a 5G compatible plan.
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For details on usage fees and how to use the World Data Flat, refer to the link below.
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By using the overseas usage app, you can smoothly make advance settings in Japan and start data transmission at your destination.
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