Samsung S6 devices' Android 6.0 Marshmallow is now in development. An official list from Samsung has revealed that a total of 15 models of Galaxy S6 will receive Google's most refined Android software upgrade in history.

Samsung Galaxy S6 is now undergoing the development phase of Android 6.0 Marshmallow wherein the South Korean tech giant is preparing its own software to integrate with the new build from Google.

When the development phase is over, testing will immediately come after wherein the performance of the new build is being evaluated if permissible to release. If it becomes successful, official release will follow.

According to the list of the Samsung's Marshmallow roadmap, the biggest Android upgrade will come out in the first quarter of 2016. Earlier reports pointed out that the upgrade might come as early as January.

Here is a complete list of Samsung Galaxy S6 models to receive the official Android 6.0 Marshmallow:

Instead of copying and pasting phone numbers, users can now instruct Google Now to find them and put them on the dialer, etc. For privy users, they can always turn off or disable the feature to get away from content screening.

Marshmallow will also roll out to Galaxy Note 5, Galaxy S6 Edge+, Galaxy S6 Edge, Galaxy Note 4 and Galaxy S5, among others.