Google's recently released software Android 6.0 Marshmallow update for Samsung Galaxy Note 5, Galaxy Note 4 and Galaxy Note 3 is expected to be rolled out as early as this December.

A report by PC-Tablet has claimed that Samsung may release Android 6.0 Marshmallow to Galaxy Note 5 and Galaxy Note 4 by the end of this year before rolling it out to Galaxy Note Edge and Galaxy Note 3. 

The website went on to claim that Samsung devices on contract with major carriers in the US -- Verizon Wireless, AT&T, Sprint, and others – may get the firmware update when it is released to International counterparts.

A report by PC-Tablet said, "beta version of Android 6.0 build for Galaxy S6 is already ready". However, it is yet to be released for testing.

It may be mentioned that Samsung left many disappointed by releasing Android Lollipop late to most of its high-end devices. It is yet to open up on Android Marshmallow update schedule for its devices by T-Mobile, which has announced on its support page that the firmware will come to Galaxy Note 4, Galaxy Note 5, Galaxy Note Edge, Galaxy S5, Galaxy S6, Galaxy S6 edge, Galaxy S6 edge+ and Galaxy Tab S2.

On the other hand, GSM Arena has given out a list of Samsung devices that will receive Android 6.0 Marshmallow. They are, Samsung Galaxy S5, Samsung Galaxy Note 4, Samsung Galaxy Alpha, Samsung Galaxy A8, Samsung Galaxy A7, Samsung Galaxy S6, Samsung Galaxy S6 edge, Samsung Galaxy S6 edge+ and Samsung Galaxy Note 5.