The Quantum is a smartphone designed and manufactured by LG and runs Windows Phone. The device features a 3.5-inch display, 16GB storage, 5MP camera, QWERTY keyboard and powered by a 1GHz processor.
The full specifications of the LG Quantum follows:
| U.S. Carriers | AT&T | |
| A.K.A. | LG C900, LG Optimus Quantum | |
| Buy | Amazon | AT&T | UNLOCKED |
| OS | Windows Phone 7.0 | |
| Size | Dimensions | 119.5 x 59.5 x 15.2 mm |
| Weight | 176 g | |
| Display | Type | TFT capacitive touchscreen |
| Size | 3.5 inches | |
| Resolution | 480 x 800 pixels | |
| Features | multi-touch input | |
| Memory | Internal | 16GB |
| External | No | |
| Connectivity | 2G | GSM 850 / 900 / 1800 / 1900 |
| GPRS - 48 Kbps EDGE - 236.8 Kbps | ||
| 3G | HSDPA 850 / 1900 / 2100 | |
| HSDPA, HSUPA | ||
| WLAN | Wi-Fi 802.11 b/g/n DLNA | |
| Bluetooth | 2.1 A2DP | |
| Infrared | No | |
| USB | 2.0 microUSB | |
| Camera | Rear | 5MP |
| Front | No | |
| Video | 720p | |
| Features | geo-tagging auto-focus LED flash | |
| Hardware | CPU | 1GHz Scorpion |
| GPU | Adreno 200 | |
| Chipset | Qualcomm QSD8650 Snapdragon | |
| ROM | 512 MB | |
| RAM | 256 MB | |
| Radio | Stereo FM | |
| Audio | 3.5mm connector | |
| Video | ||
| GPS | A-GPS | |
| Sensors | acceleromter proximity sensor | |
| Others | digital compass | |
| Design | Side slider QWERTY keyboard | |
| Colors | Black | |
| Software | Manufacturer | HTC Sense |
| Others | Windows Phone apps Microsoft Office mobile | |
| Battery | Li-Ion 1500 mAh | |
| Stand-by | 350 h | |
| Talk time | 6 h | |
| Playback | ||