The M8 uses an all-metal unibody chassis that comes in Gunmetal Grey, Glacial Silver, and Amber Gold. The metal unibody chassis is a key differentiator for the M8 and gives it a unique look and feel as well as great build quality.

The phone has a bright 5" 1920x1080 LCD3 display with 441ppi. It has wide viewing angles and colors are vibrant with excellent whites and good blacks.

HTC was one of the first to focus on improving the built-in speakers of smartphones with the introduction of 'HTC BoomSound'. The M8 uses stereo front facing speakers which are fantastic because the sound is finally aimed towards you instead of away from you. HTC also included built in amps to power the One M8 to 95dB without distortion.

The 5 MP front-facing camera on the M8 is even higher resolution than the rear-facing camera and with comparable image quality.

HTC offers choice between HTC's user interface and the stock Android experience.

The microSD card slot can expand the M8's storage to up to 128 GB.

Qualcomm's Quick Charge 2.0 allows for significantly quicker charge times. With Quick Charge 2.0 the time to charge the M8 to 25% for example will drop from an hour to only 12 minutes. Unfortunately, the M8 does not include a charger equipped to use the new technology in the box but will be an optional accessory.

HTC One M8 has a 2600 mAh battery that according to Phonearena would drain in about 7 hours of typical use.