Japan’s mobile carrier NTT DOCOMO plans to introduce high-quality voice and video calls using Voice-over-LTE (VoLTE) technology on its LTE network, beginning late June, Lteworld.org reports, noting that four smartphones and two tablets in DOCOMO\'s summer lineup will become compatible with the new service after a software update scheduled in or after late June.

The service will allow users to receive Area Mail disaster-information notifications while making VoLTE voice/video calls. Also, users will be able to access high-speed LTE data communication during VoLTE voice calls.