This guide describes settings that must be configured on 4G LTE Smartphones for use overseas and how to use these devices.
Confirming Data Charge subscription status
To use World Data Flat, you must be subscribed to Data Charge. (Free)
Check your subscription status and apply by clicking the button below.
Turn your device's international settings on [1]
(1) Using data communications
<If necessary> Airplane Mode setting
If necessary, set your device to Airplane Mode during your flight.
(2) Making calls and using SMS
From the settings, check that "Data Roaming" is set to on.
Once you have arrived abroad, you be notified via SMS of whether or not you can use the World Data Flat service. This SMS notification is sent free of charge.
By clicking the URL in the SMS notification (http://www.sekai.kddi.com/kddijp-up/), your browser is launched and the "start service" screen is displayed. If using the World Data Flat App, the "start service" screen is displayed by starting the app.
Turn Wi-Fi off to display the "start services" screen.
Push the "start services" button
Turn Wi-Fi off to display the "start services" screen.
For World Data Flat
You should now be able to use.