As soon as the Google announced the Android M, HTC confirmed that One M9 and One M9Plus will be updated to the latest Android version. Jeff Gordon, Senior Global Online Communications Manager of HTC made it public through Twitter.
Good news! The HTC One M9 and One M9+ will be updated to Android M, with more devices to be announced soon.
— Jeff Gordon (@urbanstrata) May 28, 2015
Even though HTC listed only two devices, we can expect the latest Android M update for HTC One M8, One E9+ and other upcoming smartphones from HTC. Android M comes with a lot of improvements and customizations. The HTC One M9 and One M9Plus are launched earlier this year and run on Android 5.0 Lollipop out-of-the-box.
HTC One M9 comes with 5-inch FullHD (1080×1920) Super LCD3 display with a pixel density of 441ppi and has a Corning Gorilla Glass 4 protection. It is powered by Snapdragon 810 MSM8994 octa-core processor coupled with Adreno 430 GPU and 3GB of RAM. On the other hand, the HTC One M9Plus sports a 5.2-inch QuadHD (1400×2560) Super LCD3 display with Corning Gorilla Glass 4 protection on top it. The One M9Plus is powered by MediaTek MT6795T octa-core processor clocked at 2.2GHz coupled with PowerVR G6200 GPU and 3GB of RAM. Both the devices have 32GB of internal storage along with microSD card slot to support up to 128GB. But the One M9Plus has the fingerprint scanner embedded into the home button below the display.
Other specifications remain same for both the devices including the battery of 2840mAh capacity, 20MP rear camera with dual LED flash and 2.1MP front-facing camera. We can see much more functionalities added when the devices get updated to Android M.