LG Quantum (Optimus 7Q)

The LG Quantum (or Optimus 7Q as it's known outside the US) is a high-end smartphone running the Windows Phone 7 operating system available exclusively from AT&T at the time of its release. It features a 1 GHz Snapdragon processor, a 3.5-inch WVGA display, 16GB of internal storage and a horizontal slide-out QWERTY keyboard.

Additionally, the Quantum sports a rear-facing 5 megapixel camera and is 3G capable.

The Quantum's 1 GHz Snapdragon processor ensures snappy performance for most applications, with minimal slowdown even while running graphics-intensive mobile games. Its 3.5-inch WVGA touchscreen display provides the Quantum with a simple and intuitive interface for navigating the WP7 OS while its slide-out QWERTY keyboard provides a more comfortable way to input text. Meanwhile, the Quantum's 5 megapixel camera offers easy on-the-go still image capturing as well as 720p video recording.