Yu launched Android Marshmallow update for Yu Yunicorn YU5530 device. The Yu Yunicorn users will soon get to be running Marshmallow 6.0. Some of the users might got the update notification, others will get it sometime later. Before the update, users make sure to keep the battery level at above 75% or above.
Before the update of Marshmallow, you can take a backup of your data. The download size will be around 953MB. You can use a wifi connection to download and can install after the download. If you don’t get a update notification, you can go to Settings->About Phone ->System Updates to check manually.