This guide describes settings that must be configured on 3G Feature phones for use overseas and how to use these devices.
<If necessary> Airplane Mode setting
If necessary, set your device to Airplane Mode during your flight.
Turn your device's international settings on
Center key → (Tool)  → Global Function → Area Setting → Overseas
* If you are still unable to use even after setting the above, turn the power off and on, and check again.
Eligible carrier settings
If using packet communication on a 3G Feature phones, manually select an eligible carrier at your travel destination. With automatic selection, there is a risk of connecting to a carrier that is not covered, resulting in higher packet communication charges.
You should now be able to use.
Confirm eligible carriers here by entering the service area and model.
Restore the settings for use in Japan
After returning, switch the mobile phone area settings to the domestic Japan mode to use.
Center key → ツール(Tool)  → グローバル機能(Global Function) → エリア設定(Area Setting) → 日本(Japan)