The HTC One (M8) for Windows is a Windows Phone 8.1 device announced on August 19th, 2014 in New York City. The phone is the same make as the version that features the Android operating system revealed by HTC in March 2014. This release is the first new Windows Phone from HTC in nearly two years, except for the one-off HTC 8XT for Sprint.

The One for Windows is made possible by Microsoft's loosening of its hardware requirements in early 2014, which lets manufacturers quickly port their Android hardware over to Windows Phone.

The HTC One for Windows was exclusive for Verizon Wireless in the US. Starting on November 7, AT&T has begun to sell the HTC One for Windows in the US. T-Mobile was supposed to launch it on Sunday, November 9, although the phone is still on hold.

The One features a 2.3 GHz Quad-core Snapdragon 801 CPU, 32 GB of internal storage, micro SD (up to 128 GB), and 2 GB of RAM. The HTC One also has a second camera on the rear of the phone to provide "depth information" that lets you add all sorts of cool effects to images in post-processing. The second camera lens sits above the main camera. The HTC One also continues with the "Ultrapixel" technology. The original version sported a 4-megapixel sensor, but with larger pixels on the sensor, allowing for greater light sensitivity.

The phone additionally has an infrared port on top that works with the HTC channel-changing app for home theater setups. The display is a 5-inch Full HD, Super LCD3 display with Corning Gorilla Glass 3 with 441 ppi. Due to the aspect ratio and previous recycling of hardware by HTC, the One for Windows has on-screen buttons instead of capacitive. Those buttons can hide with a small down-arrow on the left of the button bar, and it users can swipe up to bring it back. There is no dedicated camera button; instead, users need to launch the camera through an app. The HTC One's camera uses the customized HTC Camera app but also maintains the native Windows Phone camera app as well.

The HTC One for Verizon and AT&T comes in Gunmetal Gray, and it has the trademark brushed aluminum finish, with nearly 90% of the body being metal. The nearly all-metal body contributes to the rather solid feel of the device, which weighs in at 160 grams.

The HTC One for Windows does support the interactive Dot View Case and HTC BlinkFeed (a newsreader).

Launched on August 20th on Verizon, the HTC One for Windows comes preinstalled with Windows Phone 8.1 Update, aka Windows Phone 8.1.1.