OnePlus has finally brought VoLTE support for its 2015 flagship, the OnePlus 2. The latest OxygenOS 3.5.5 build based on Marshmallow brings a host of new features, but the Nougat update that for promised for the OnePlus 2 is still no where to be found. The update will be rolling out in a phased manner, and will be reaching a small number of users initially – with a broader roll out coming soon.