[Solved]:Android Operating system.

[#1]

All Samsung phones with 5.0 and above running OS should get an update for Android 6.0 marshmallow !

[#2]

Hey
Currently no such information is available :).

[#3]

I too am waiting for marshmallow on my Samsung device  :)

[Sumitraa]

good one

[AngelSusmita]

nice one