New Android 5.1 update revealed for Android one phones

Google's android one website has revealed the existence of the android 5.1 version on the android smartphone platform.Prior to this was the android 5.0.2 update which was released for the Nexus and the tablets.Although,it is unclear on whats really is present in the update.Some sources say that the new features include the restoration of the silent mode (which was missing in the initial Android 5.0 Lollipop update),a improved battery and RAM management, and an updated Material Design.
It is also unclear on when the update would be available for the other users(android one users as well).