The Android 6.0 Marshmallow update is expected to arrive on 5th October, so you have not got long to wait to enjoy the new features. However, you might want to know whether or when my phone gets the new Android 6.0 Marshmallow update. HTC users check out below list. Other smartphone users check out [HERE] my previous post.
HTC insider @LLabTooFeR lists a set of HTC phones that are getting Android 6.0 Marshmallow update along with company’s Sense 7 UI. Though no mention about the ETA (expected time of arrival), newest phones, such as HTC One M9, HTC One M9+, etc. might receive the Android 6.0 update in the first quarter of 2016.
Below is a list of HTC phones that are getting Android 6.0 Marshmallow update. Though not a final list, these phones will get the update along with HTC’s Sense 7 UI.
Please note that this is not a final list and official. The List of devices can change according to HTC. Even if your phone is not in this list, no need to worry. You will get Android 6.0 Marshmallow in the form of custom ROMs. (Source)