Samsung may be one of the leaders in the mobile phone industry today, but it has not been prompt when it comes to bringing software updates to its devices, including flagships. With several devices from other major mobile phone makers already having received Android 6.0 Marshmallow some months ago, owners of Samsung Galaxy S5, Galaxy S6, Galaxy Note 4, Galaxy Note 5 and others will be eager to know when their devices will get the update. 

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While it appears like Samsung will roll out Android 6.0 Marshmallow to its high-end devices very soon, its timing still remains elusive. The firmware beta has already being released to Galaxy S6 and the testing will end on 18 January. So, one can expect the firmware update any time after that – tentatively in late January or early February.

Surprisingly, Samsung hasn't announced the list of its devices that will receive the firmware, but it is almost certain that Galaxy S6 and Galaxy S6 Edge will get it. The Android 6.0.1 Marshmallow (latest version) beta has already been rolled out to the devices.

The South Korean electronics giant hasn't released Android 6.0 Marshmallow or Android 6.0.1 beta to most high-end devices, but T-Mobile has confirmed that Galaxy Note 4, Galaxy Note 5, Galaxy Note Edge, Galaxy S5, Galaxy S6, Galaxy S6 Edge, Galaxy S6 edge+ and Galaxy Tab S2 will receive the firmware though it didn't reveal the release date. 

Other Samsung devices that are expected to get the new firmware are Galaxy Alpha, Galaxy A7, Galaxy A8, Galaxy Note 4 Duos, Galaxy S6 Duos, Galaxy S5 Neo, Galaxy A5, Galaxy A3, Galaxy S5 LTE-A, Galaxy E7, Galaxy E5, Galaxy J7, Galaxy J5 and Galaxy J2. However, nothing has been confirmed as of now. 

Going by history and the pace at which Samsung is currently working on bringing Android 6.0 Marshmallow to its devices, it appears like the firmware update will run well into the late 2016 for some smartphones. Nothing is certain at the moment, despite beta testing been initiated on a couple of devices as things can take a different course during testing but we do hope that at least Galaxy S6 and Galaxy S6 Edge will get it in the next few weeks or even in a matter of days.