VoIP services market, Rise in number of portable device customers, has led the demand , Comprehensive Analysis 2016 & 2021.
Global demand for VoIP service market was valued at USD 83 billion in 2015, is expected to reach USD 140 billion in 2021, growing at a CAGR of above 9.1% by 2021http://www.marketresearchstore.com/news/global-voip-services-market-is-expected-to-reach-above-231