It still has nice premium construction,sturdy feel good choice of materials. The phone will now comes in two tone colors as the sides will have different color and the front and back will have different e.g Silver version will now have gold stripes on it. M9 will now have brushed look and more pronounced edges on it's edges. The phone is not much slippery like the One M8 so you should have reliable grip of the phone. Unfortunately it has little gaps on the sides which makes the phone little sharper on holding. HTC has now changes the power button to the side which is very appreciated. The curvy look of the phone is now lost.
It still has the 5" 1080p Super LCD 3 display not QHD but it's still a great display having great viewing angles, awesome brightness and great color reproduction. This is one of the most 1080p display out there. The specs of the phone now gets a bump up to the latest Qualcomm Snapdragon 810 octa-core processor with Adreno 430 graphics backed by 3GB of ram. The phone comes with 32GB of internal storage and the micro SD card expandable storage upto 128GB. The phone also sees the welcome adition of Android 5.0 Lollipop with the new HTC Sense 7.0 UI on the top. The battery also gets a bump up from 2600mAH to 2840mAh which hopefully last a day with ease.
The most highlighted spec of the One M9 is the camera on the back. It rocks all new 20MP sensor with the dual Led flash weather it does not comes with optical image stabilization but it can now capture raw images and 4K video recording .The camera is also very fast in shooting the photos. Pictures are captured immediately when the Auto Mode is turn ON. The front of the phone is also 4MP ultrapixel camera which take very good wide angle selfies.
HTC openly admits that they combined the strengths of 2013’s One M7 and 2014’s One M8 to create what it believes is the best One yet. But remixing the past is not a sign of innovation, and neither is the addition of a fast new processor just because it’s fast and new, or multiplying the megapixels of a camera that’s still not good enough. But HTC can do it beter.