The document discusses trends in unified communication and collaboration (UC&C) on mobile devices. It finds that smartphones are now the preferred device for UC&C services, with global smartphone connections expected to grow from 5.7 billion in 2016 to over 7.4 billion in 2020. It also finds that over-the-top (OTT) applications are dominating UC&C sessions compared to other access types. Improved audio and video quality, ease of use, and battery life are seen as important future features. Mobile network operators and OTT providers are both well positioned to drive further adoption of UC&C on mobile platforms.