LG Crystal

The LG-GD900 (codenamed and retroactively called LG Crystal) is a fashion-focused slider with high end specifications phone from LG Electronics that was publicly unveiled at Mobile World Congress 2009.[1] It is claimed to be the world’s first transparent design phone. It comes with a dedicated Bluetooth headset that is also transparent in parts.

LG-GD900

Manufacturer	LG Electronics
Compatible networks	HSDPA 7.2 Mbit/s
Availability by region	Q2 2009
Form factor	Slider
Dimensions	13.4 mm thick
Operating system	LG S-class interface
Memory	1.5 GB
Removable storage	up to 32 GB
Battery	1000 mAh
Display	800×480, 16 million colours, WVGA
Rear camera	8 MP
Connectivity	Bluetooth 2.0, WiFi
Data inputs	keypad, capacitive 3" touchscreen, gesture recognition

The transparent part of the GD900 is the sliding keypad, which is designed to glow when in operation. The main casing material is metal and the phone is 13.4 mm thick.[2] LG decided to ship GD900 with a tempered glass keypad like a screen.

In terms of features, the phone supports 7.2 Mbit/s HSDPA and has a rear-mounted 8 MP camera with flash.[3] LG released most of the phone's specification at the launch event in London on 28 May 2009. The GD900 was released in mid-June in Germany, and in 40 other countries worldwide on 1 July 2009.