"OxygenOS" - OnePlus Names Its Custom ROM
OnePlus forum administrator Bradon H wrote a post on the official announcements forum that the goal for the team was to make a product that themselves would want to use. Engineering their own ROM allows OnePlus team to have complete control over the software experience offered by their products. It means they can decide when the new updates are released, what customisations are included and what features are excluded in every update.

There are no previews or leaks available as of now. OnePlus promises to release more information about the OxygenOS on February 12th. It's not clear whether OxygenOS will ship as the default firmware on all the phones that OnePlus ships in future or just the ones that are made available in Indian markets. We're keeping track of all the developments.
Source: #-Link-Snipped-#