The Blackberry Q20 is a smartphone that embodies the classic design and functionality that BlackBerry is known for. Key features of the Blackberry Q20 include:

1. Physical QWERTY Keyboard: The Q20 retains the iconic physical QWERTY keyboard, which is a hallmark of BlackBerry devices. This feature is particularly appreciated by users who prefer the tactile feedback and speed of typing on a physical keyboard over a touchscreen.

2. Full HD Display: The Q20 features a 3.5-inch full HD display with a resolution of 720 x 720 pixels. This provides a clear and sharp viewing experience, ideal for reading emails, browsing the web, and consuming multimedia content.

3. BlackBerry 10 OS: The Q20 runs on the BlackBerry 10 operating system, which offers a user-friendly interface and a suite of productivity tools. This includes the signature BlackBerry Hub, which provides a unified view of all messages, emails, and social media notifications.

4. Physical Navigation Keys: The Q20 includes physical navigation keys, which are a throwback to the classic BlackBerry design. These keys allow for easy navigation and are particularly useful for one-handed use.

5. 8-Megapixel Camera: The device is equipped with an 8-megapixel rear camera and a 2-megapixel front-facing camera. The camera offers a variety of shooting modes and features, including HDR and time-lapse video.

6. Battery Life: The Q20 is known for its impressive battery life, which can last for an entire day of heavy use. This is due in part to the smaller screen size and the efficient BlackBerry 10 OS.

The Blackberry Q20 was released in 2014 and was designed to cater to the needs of business professionals and power users who valued the classic BlackBerry experience. The decision to retain the physical QWERTY keyboard was particularly strategic, as it was a key differentiator for the brand. According to a study by Strategy Analytics, as of 2014, 40% of BlackBerry users preferred a physical keyboard over a touchscreen (Strategy Analytics, 2014). This indicates that the Q20's design was well-aligned with the preferences of its target audience. Additionally, the Q20's battery life was a significant selling point, as battery performance is a critical factor for many smartphone users. A report by NPD Group found that battery life was the second most important feature for smartphone buyers, trailing only screen size (NPD Group, 2015). The combination of these features made the Blackberry Q20 a compelling choice for those looking for a device that balanced classic BlackBerry design with modern functionality.