HTC’s UK Twitter account has announced that Android 6.0 Marshmallow is rolling out to carrier variants of the One M8. Interestingly, the newer M9 will have to wait a while longer to get Marshmallow.
arsTechnica has put together a handy look at which manufacturers & carriers are quickest and slowest to roll out an Android update on their older devices. Using the KitKat launch date of 31st October 2013, arsTechnica measured how long it took for the earliest available OTA update for devices originally sold with an earlier version of Android, starting with the previous-generation flagship devices.
The winner for update times is, of course, the Nexus line. Stock software and a head start from being Google got KitKat out the door in just 14 days.
As for everyone else, how quickly they update seems to depend on how complicated their skin is and how much they take advantage of the update mechanisms Google has created …