Whether you can continue to use data communication when in another country will depends on the service you are using.
Please see below for details.
New reservations acceptance for World Data Flat have ended on March 15th, 2024. If you have made a reservation before March 15th, refer to this page.
If you are using au Overseas Unlimited, please click here (in Japanese only)
You can continue using World Data Flat after March 15th, 2024.Please refer to this page.
You can continue to use the World Data Flat without any additional charges even if you travel to any of the eligible countries/regions.
You can continue to use it without additional charges only when travelling between countries and regions eligible for the Reservation Discount of 490 yen / 24 hours.
If you travel to a country and region eligible for the Reservation Discount of 690 yen/24 hours during the usage period, the count of the remaining time will continue, but data transmission will stop.
To resume data transmission, you will need to start using the World Data Flat from a web browser or the overseas usage app.
However, in addition to the Reservation Discount fee of 490 yen/24 hours, a fee of 980 yen/24 hours will be added as no reservation charge.
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