HTC One M8 smartphones can now get the Android 6.0 Marshmallow upgrade through Resurrection Remix custom ROM. The unofficial build offers quite a number of new features on top of Marshmallow's set.
Android 6.0 Marshmallow upgrade is now available to Sony Xperia Z2 smartphones as a senior member of XDA developer forum made a custom ROM based on Android Open Source Project (AOSP). More details here.
Android 6.0 Marshmallow update can now be installed on selected devices via custom ROMs. Three ROMs are now available for LG, Samsung, Sony, Motorola, HTC and more with a lot of features. More details here.
Google Nexus 4, Nexus 5, Nexus 5X, Nexus 6 and Nexus 6P can now manually install the Android 6.0 Marshmallow software. The build brings a host of improvements on performance and stability. More details here.
LG G Stylo devices will be receiving the official over-the-air Android 6.0 Marshmallow update very soon. The upgrade is expected to come before the year ends or as early as January 2016. More details here.
Sprint versions of LG G4 are now receiving the official over-the-air Android 6.0 Marshmallow upgrade. The mobile carrier is the first in the United States to roll out the new build. More details here.