The rollout of the latest Android Marshmallow update to Google's Nexus devices has got other smartphone-owners curious. Samsung, which has the largest user base for Android smartphones, is yet to join the Marshmallow bandwagon, but users are eagerly waiting for the official rollout.

While everything is discreet at the moment, Android Geeks speculated last month that developers at Samsung are already working on releasing the latest update for Galaxy devices. As per the report, the Galaxy S6, Galaxy S6 Edge, Galaxy S6 Edge+ and Galaxy Note 5 will be first ones to get the Android 6.0 Marshmallow update over-the-air.

A separate report from PC-Tablet last month found a beta version of the Android Marshmallow build for Galaxy S6 in the wild. This could mean Samsung's 2015 Galaxy flagships will receive the update this year while older devices such as Galaxy S5 and Galaxy S4 will be updated some time next year.

Google released Android 6.0 Marshamllow with significant upgrades under the hood. The new OS comes with native support for fingerprint sensor, faster Chrome browser, upgraded Now on Tap feature, new seucirty feature-verified boot system, support for international dialects, Google photos and auto backup for apps under 25MB on Google Drive.

One of the most important features is the Doze power saving mode, which is expected to boost a smartphone's life at least by 30%, depending on the configuration.