Sanjeev
Core Member

OnePlus Co-Founder Carl Pei on Monday revealed CM12S will be released for theOnePlus One smartphone roughly alongside the stable build of OxygenOS in mid-to-late March.
Pei was responding to a user query on Twitter, and announced a March release of both builds apart from apologising for the delay. Pei later confirmed a more precise release date, of mid-to-late March.

The announcement by Pei is a follow-up to the announcement by Cyanogen in late January that the CM12S Lollipop build for the OnePlus One has entered the "QA/QE stage for release." OnePlus earlier this month also revealed some more details about the upcoming stable OxygenOS build for the One smartphone. Also earlier this month, OnePlus and Cyanogen released the CM11S 05Q update, and it was made available over-the-air (OTA) for users globally.
OnePlus One to Get Stable CM12S, OxygenOS Builds in Mid-to-Late March | NDTV Gadgets