LONDON--(BUSINESS WIRE)--The GSMA welcomes the announcement by South Korea’s mobile network operators to launch the world’s first commercial interconnected VoLTE service. The service, which is supported by the Ministry of Science, ICT and Future Planning as well as the GSMA, was officially unveiled by Minister Yang Hee Choi this week and will launch later this month. It will deliver higher quality calls and seamless switching between voice and video, as well as faster connection speeds to subsc