TAMPA, Fla.--(BUSINESS WIRE)--Syniverse today announced that it is enabling South Korea’s LG Uplus to launch the world’s first commercial VoLTE (voice over LTE) roaming service, featuring HD voice. Made possible by Syniverse’s IPX network, the service allows LG Uplus subscribers to roam onto the KDDI network in Japan and will allow LG Uplus to expand coverage and services in additional markets. Syniverse’s IPX interconnects the world’s networks to make LTE roaming possible. With nearly 800 LTE