Voice-over-LTE won't take off until 2015, will have to compete with telephony apps
While VoLTE services find their feet, Internet-based voice services are becoming more popular. Such services, also known as over-the-top (OTT) services, include Skype, Fring, KakaoTalk, Line, Nimbuzz, WeChat and Viber. The number of mobile subscribers …
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