Contact Us

News Releases

< Back To News Releases

May 27, 2015

LG Uplus Launches VoLTE Roaming Over Syniverse IPX Network

TAMPA, Fla. – May 27, 2015 – 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 roaming routes, Syniverse’s IPX reaches more than 200 operators in 44 countries. This reach includes 104 direct connections that enable Syniverse to launch VoLTE trials and deployments around the globe. As a result, Syniverse recently enabled the world’s first transoceanic VoLTE roaming call and has direct LTE connections with 14 of the 16 operators that have launched VoLTE.

“Because LTE roaming is the prerequisite to launch VoLTE, Syniverse’s reach to nearly every operator that has launched LTE roaming enables us to achieve the critical reach and coverage our subscribers will demand,” said Hong Jun Choi, General Manager, LG Uplus.

With the Syniverse IPX, operators have the flexibility to implement VoLTE through S8 home routing, local breakout or VoLTE interconnect, which are three key emerging VoLTE implementation models. LG Uplus is launching VoLTE over IPX through Syniverse’s S8 home-routed LTE data roaming platform, which allows operators to rapidly deploy VoLTE by leveraging their existing LTE data roaming connections. Additionally, the Syniverse IPX is prepared to offer other IP-based multimedia service features such as video over LTE (ViLTE) and rich communication services (RCS).

“The transition to VoLTE involves a number of challenges. As new equipment is installed and mobile devices are made with the necessary hardware, it’s essential to provide operators with solutions to enable a variety of approaches to meet their specific needs,” said MK Chang, Vice President, Advanced Signal and Network Interoperability, Mobile Transaction Services, Syniverse. “Having provided the critical LTE building blocks of IPX and Diameter Signaling for these operators, we were perfectly positioned to support the breakthrough VoLTE implementation.”

About Syniverse
Syniverse is the leading global transaction processor that connects more than 1,500 mobile service providers, enterprises, ISPs and OTTs in nearly 200 countries and territories, enabling seamless mobile communications across disparate and rapidly evolving networks, devices and applications. We deliver innovative cloud-based solutions that facilitate superior end-user experiences through always-on services and real-time engagement. For more than 25 years, Syniverse has been simplifying complexity to deliver the promise of mobility – a simple, interoperable experience, anytime, anywhere. For more information, visit, follow Syniverse on Twitter or connect with Syniverse on Facebook.

For more information:

Bobby Eagle

Syniverse Public Relations

Download PDF