How to use : iPhone and iPad

This guide describes settings that must be configured on iPhone and iPad for use overseas and how to use these devices.

Before departing

  • 1

    Confirming Data Charge subscription status

    To use World Data Flat, you must be subscribed to Data Charge. (Free)

    Even when using Two-step data flat for Overseas, when subscribed to Data Charge, the "start service" screen will always appear before you use data communications overseas.

    • You will not incur any data communications charges until you push "start services".

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

  • 2

    Turn your device's international settings on [1]

    (1) Making calls and using SMS and data communication

    (iOS10 or later)

    "設定(Settings)" → "モバイルデータ通信(Cellular)" → "通信のオプション(Cellular Data Options)" → "ローミング(Roaming)" → set "音声通話ローミング(Voice Roaming)" and "データローミング(Data Roaming)"to ON and "グローバルCDMA(International CDMA)" to OFF

    (iOS9.3 or later)

    "設定(Settings)" → "モバイルデータ通信(Cellular)" → "モバイルデータ通信のオプション(Cellular Data Options)" → "Roaming" → set "Voice Roaming" and "Data Roaming"to ON and "International CDMA" to OFF

    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)".

    Setting example) For making calls and using SMS and data communication

    ■iPhone(iOS9.3 or later)

    "設定(Settings)" → "モバイルデータ通信(Cellular)" → "モバイルデータ通信のオプション(Cellular Data Options)" → "Roaming" → set "Voice Roaming" and "Data Roaming"to ON and "International CDMA" to OFF

    * If you are still unable to use even after setting the above, turn the power off and on, and check again.

    image
    1. Select "設定(Setting)".
    image
    1. Select "モバイルデータ通信(Cellular Data)".
    image
    1. Select "モバイルデータ通信のオプション(Cellular Data Options)"
    image
    1. Select "ローミング(Roaming)".
    image
    1. Set "音声ローミング(Voice Roaming)" and "データローミング(Data Roaming)" to ON and "グローバルCDMA(International CDMA)" to OFF

    <If necessary>Airplane Mode setting

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

    (2) Making calls and using SMS only

    (iOS10 or later)

    "設定(Settings)" → "モバイルデータ通信(Cellular)" → "通信のオプション(Cellular Data Options)" → deselect "4Gをオンにする(Enable 4G)" → "ローミング(Roaming)" → set "音声通話ローミング(Voice Roaming)" to ON and "データローミング(Data Roaming)"to OFF

    (iOS9.3 or later)

    "設定(Settings)" → "モバイルデータ通信(Cellular)" → "モバイルデータ通信のオプション(Cellular Data Options)" → deselect "4Gをオンにする(Enable 4G)"  → "ローミング(Roaming)" → set "音声通話ローミング(Voice Roaming)" to ON and "データローミング(Data Roaming)"to OFF and "グローバルCDMA(International CDMA)" to OFF

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 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.

    • When subscribed to Data Charge, you will not incur any data communications charges until you push "利用開始(start services)"
    SMSメッセージイメージ図
    利用開始画面イメージ図

    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.

    世界データ定額の場合

    For World Data Flat

    海外ダブル定額の場合

    For Two-step data flat for Overseas

    従量課金の場合

    For pay-as-you-go

    You should now be able to use.

After returning

Restore the settings for use in Japan

If you deselect "4Gをオンにする(Enable 4G)", please use your device by selecting "Voice & Data".

(iOS10 or later)

"設定(Settings)" → "モバイルデータ通信(Cellular)" → "通信のオプション(Cellular Data Options)" → "4Gをオンにする(Enable 4G)" → select "音声通話とデータ(Voice & Data)"

(iOS9.3 or later)

"設定(Settings)" → "モバイルデータ通信(Cellular)" → "モバイルデータ通信のオプション(Cellular Data Options)" → "4Gをオンにする(Enable 4G)" → select "音声通話およびデータ(Voice Roaming and Data)"

Notes

If you tap "Enable 4G" from "設定(Settings)" → "モバイルデータ通信(Cellular)" → "通信のオプション(Cellular Data Options)" and switch from "音声とデータ(Voice & Data)" to "データ通信のみ(Data Only)" or "オフ(Off)" while using your iPhone (iOS 8.3 or later) overseas, [2] after returning to Japan and restoring the settings to what they were before you went abroad, reconfigure the settings for voice call services such as Answering Service EX and Call Forwarding Service.

for how to set (choose a voice call service)

  1. If Cellular Data is OFF, "Voice Only" and "Off" are displayed.
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