Three of the Big Four carriers in the US have already rolled out Marshmallow to the HTC One M8 and M9 units on their network. So we can say the Marshmallow update for AT&T-branded M8 and M9s is already delayed. Worse still, it has been revealed that the update has been hit by further delays. The revelation was made by the Taiwanese company's VP of Product Management Mo Versi on Twitter. HTC One M8 & M9 AT&T owners - there's been a slight delay on M OS. We're in lab but looking at approval within the next couple weeks. Mo Versi (@moversi) April 29, 2016 The reason behind the...
Source: http://www.gsmarena.com/marshmallow_update_for_at_t_htc_one_m8_and_one_m9_hit_by_further_delays-news-18042.php