Passengers with cell phone services for children (SoftBank)

The Kodomo Mobile 812T from SoftBank is equipped with a Security Light that flashes in sync with a security buzzer when the Security Buzzer tab is triggered.

Pulling this Security Buzzer tab causes an ultra-loud 100-decibel security buzzer to sound and a Security Light to flash. Next, the device will automatically place a voice call or video call to a special contact number the customer set in advance, and send an email that notifies the receiver of the customer’s current location.
For in-flight safety reasons, use of electric (electronic) devices is prohibited. In-flight use of cell phones that transmit data is prohibited at all times, and passengers are requested to turn off cell phones before boarding.