YU has announced this via twitter -
The update you have been waiting for. Announcing Cyanogen OS 12.1 update to roll out soon. pic.twitter.com/esuuQ2gytg— YU (@YUplaygod) September 28, 2015
The Devices which will get Android 5.1.1 Cyanogen OS 12.1 includes -
- YU Yunique
- YU Yureka Plus
- YU Yureka
- YU Yuphoria
The update will start rolling out soon in October 2015 .