While we don’t have specific release dates yet, Android 6.0 Marshmallow is set to come to Asus’ PadFone S, ZenFone 2, ZenFone 2 Deluxe, ZenFone 2 Laser and ZenFone Selfie.
The information was posted on Asus’ official ZenTalk forum by an Asus community administrator.
We’ll update this post with specific release dates when we have them.
[source]Asus[/source]