HTC One is on display at a store. (Reuters)Reuters

HTC has released another teaser picture of its upcoming flagship phone, revealing key display design elements of the device.

This is the second HTC 10 (aka One M10) teaser after the announcement of the launch date (April 12). In the teaser, we see the metal-clad HTC device's screen featuring one curved rectangular physical home button centered at the bottom and a couple of back-lit capacitive buttons in rectangle (back) and square (recents) shapes on the left and right side, respectively.

The HTC teaser's caption, "Not all phones are created equal. The fastest and smoothest Android. You'll feel it. #powerof10," hints the HTC 10 may come packed with top-notch hardware and latest Android Marshmallow OS.

Also read: HTC 10 (aka One M10) benchmark score leaked; phone outranks Xiaomi Mi 5, Galaxy S7, iPhone 6S and others

So far, HTC has released five teasers, three before the launch date was announced and two after it was revealed. All teasers indicate the HTC 10 will boast sleek metal-clad body, dual-lens-based world class cameras, BoomSound audio technology, two back-lit capacitive buttons with physical home button, which in all probability will house fingerprint sensor as it has become a norm in the smartphone industry.

If the rumours are to be believed, HTC 10 is expected to feature a 5.2-inch super LCD 5-based QHD (2560x1440p) screen, Android Marshmallow OS, Qualcomm Snapdragon 820 quad-core SoC (System-on-Chip), 4GB RAM, 64GB/128GB with option for expansion via micro SD card and a 3000mAh battery.

As far as the camera is concerned, it is said to house 12MP Sony IMX377 camera featuring 1.55mm lens, laser autofocus and PDAF (Phase Detection Auto Focus) and Samsung's 5MP UltraPixel (s5k4e6) snapper on the front.

HTC has confirmed to host the launch event in three cities — New York City, London and Taipei — April 12. Since there is more than a week left before the announcement, the company, in its bid to incite excitement among fans for the upcoming event, is expected to tease a few more key features of the new device.

Stay tuned for more updates.