One Plus One is all set to release in India exclusively via Amazon.in but today One Plus One has posted a letter to all Indian users.Reading the team statement would disappoint the Indian users waiting for One Plus One.The One Plus One in India will run its custom ROM which is announced few months before.Earlier the One Plus One team and CynogenMod has worked together for this launch in India.But now the One Plus One will not run CynogenMod ROM in India and it officially signed with Micromax for Yu project.

One Plus One will run custom ROM in India as CynogenMod walks out
One Plus One will run custom ROM in India:
Carl Pei has stated
OnePlus and all of our partners, including Cyanogen, have put countless hours of work into making this launch a success. Just last month, on October 7, Cyanogen released the 38R OTA update which included SAR values inside phone settings to comply with Indian regulations. Therefore, it was surprising and disappointing to hear from Cyanogen on November 26 that they had granted exclusive rights in India over the Cyanogen system to another company”.
They also announced that One Plus One will run its own custom ROM and they are working in it.The ROM will be based on the latest Android Lollipop and it will be bloatware free and lite weight OS.
Our system will be based on Lollipop, and will be built to be stable, fast, and lightweight. True to our original promise of putting user experience first, it will be bloatware-free and only carry the features important to our users. We appreciate the work that Google has put into Android, and we have no plans of departing from Material Design nor adding unnecessary customizations. We can’t wait to hear your feedback and to build it together with you”.
They also confirmed that this change in OS will not affect the launch date of One plus One in India.It will be launched on 2nd December exclusively Via Amazon.However, the One Plus One will run CynogenMod as of now and the Indian users will get the new its own custom ROM update next year.
Source | Via