2015 was a strong year for VoLTE, with connections growing 5x to reach 125 million by year end, on a path to almost 2.5 billion in 2022. VoLTE deployments will also provide a catalyst for Wi-Fi Calling services, growing from 22 million in 2015 to almost 800 million in 2022. With a healthy contribution from OTT voice and video calling services, circuit-switched calls will decline to 60% of voice traffic on mobile devices by 2022. This data table provides regional forecasts of VoLTE, ViLTE, Wi-Fi Calling, OTT voice, and OTT video-call accounts and traffic