From early December 2014, KDDI and Okinawa Cellular will launch Sync Call and Voice Party. These new communication services are a first for Japan, and they utilize the VoLTE high quality sound and voice calling service and features that enable simultaneous high speed data communication with LTE. 
Sync Call is a new communication service that offers users features for various daily situations they can use during voice calls with VoLTE. These features include Screen Sync, which displays the caller's smartphone screen on their recipient's smartphone; Camera Sync, which displays live images from the caller's camera on their recipient's smartphone; Location Sync, which displays the caller's and their recipient's location information on a map; and Handwriting Sync, which enables sharing of hand written text on the screen.  
The service also provides a Basic Function interface, a dedicated voice call user interface that allows users to receive an incoming call without leaving their current screen even if they are browsing the Web or using an application (movie, game, etc.) when they receive an incoming call.
Voice Party is a voice call service that enables simultaneous group calls with up to 30 people including the initial caller. Users can enjoy conversations with family and friends who are far away, use the service as a communication tool between multiple offices for business (telephone conference), and more. 
KDDI and Okinawa Cellular will continue to offer customers new communication services that utilize VoLTE and high speed data communication with LTE.
For more details, see the Attachment.
Attachment：A First for Japan! Launch of Sync Call and Voice Party―New Communication Services Using VoLTE