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Soon after Google released the Android Marshmallow update in October 2015, OEMs (Original Equipment Manufacturers) such as Motorola, Sony, HTC, Lenovo and many others listed all their respective devices eligible for the new OS update, but Samsung is the sole smartphone maker that has so far remained silent on the firmware release to its smartphones.

The South Korean company may be hesitant to make the firmware release roadmap details public, but Phone Arena's sources have reportedly succeeded to get their hands on the internal document containing the Android Marshmallow release schedule of Samsung phones and tablets.

As per the leaked document, Samsung is slated to deploy update to Galaxy Note 4 and Note edge next month and Galaxy S5, Galaxy Tab S2 (8-inch and 9.7-inch) models are expected get a taste of Marshmallow in May.

Whereas the Samsung's first metal-clad phone Galaxy Alpha will receive the new OS update in June.  Samsung Galaxy A7 (2016), which was unveiled a couple of months ago, is also said to get the new update later in the year.

Samsung has not responded to the leaked report running wild on the internet.The devices listed in the document are all premium phones and tablets and are most likely to get Android Marshmallow, but we are not sure the release schedule can be trusted. We urge our readers to take this report with a proverbial pinch of salt.

Also read: Android Marshmallow: List of Smartphones Expected to Get Google's 6.0 OS [Update]

So far, Samsung has released Android Marshmallow to Galaxy S6, S6 Edge, S6 Edge+ and Note 5.

Watch this space for more updates.