AT&T HTC One M9 and M8 users will finally start getting Android 6.0 marshmallow Today. This was announced by the Taiwanese company’s VP of Product Management Mo Versi on Twitter. So Guys keep an eye out for a notification or head to your Settings to check for it manually.
HTC One (M8 & M9) AT&T owners! Thank you for your patience. Marshmallow OS is approved, OTA to start tomorrow!!
— Mo Versi (@moversi) May 11, 2016
It’s worth mentioning that it’s been a while since the Android Marshmallow update was released by the other major carriers in the US for the HTC One M8 and One M9 so AT&T is definitely late to the party. Although AT&T will start rolling out OTA today itself but it may take one or two days to reach every user of these phones.