Notice regarding the termination of sales of IsatPhone Pro (TM) devices
IsatPhone Pro (TM) devices are no longer available for purchase by new customers as of December 1, 2015. You can continue to use the device you are currently using. The maintenance support for the devices will continue until October 2019. The succession model will be announced in the future.
Overview & Features
IsatPhone Pro (TM) is the first global satellite mobile phone provided by INMARSAT. In addition to voice calls, IsatPhone Pro (TM) can be used for short text messages, E-mail, and GPS location information.
Battery life is the longest among the satellite mobile phones sold by KDDI, providing up to 8 hours of talk time and up to 100 hours of standby time. The phone also features a large, high-visibility color LCD screen and a large keypad for easy dialing even when wearing gloves.
This service is not provided to individual customers.
Diagram of INMARSAT IsatPhone Pro (TM) network
INMARSAT services are available with INMARSAT satellite mobile phones.
INMARSAT IsatPhone Pro (TM) satellite mobile phone
170 (H) x 54 (W) x 39 (D) mm
Continuous standby time 
Up to 100 hours
Continuous talk time 
Up to 8 hours
·IsatPhone Pro(TM) handset (with SIM card installed)
·Three types of chargers (four types of AC chargers, micro USB cable for computer, 10-30 volt in-vehicle charger)
·Quick Start Guide (Japanese available)
·GPS location data
·SMS (short messages)/E-mail 
(with one standard set)
Figures for continuous talk time and continuous standby time are based on average usage time in environments with proper signal reception.
Times may be reduced due to factors such as signal reception, temperature, settings, and battery condition.
Maximum message length is approximately 1,600 single-byte characters or 740 double-byte characters, including the recipient's E-mail address. Messages are divided into a maximum of 10 parts when sent.
IsatPhone Pro (TM) service area
Japan is located within the 30-degree area, so you can extend the antenna straight out during use.