We have two telecom partners in Japan: NTT-Docomo and KDDI
-When you are connected to NTT-Docomo network (also displayed as Ubigi), the antenna pictogram will show automatically.
-When you are connected to KDDI network (can also be displayed as Ubigi), the antenna pictogram may not be displayed at the top of your device’s screen. This situation is caused by the difference of protocol between Ubigi and KDDI network but this situation does not affect your connection.
This means that even if the antenna pictogram is not displayed, your connection will work, so please try your connection and you will have access to the Internet.