How to Hard/Factory Reset | Bypass screen lock on LG KU5900?

Overview

SpecificationLG KU5900Optimus Black

LG KU5900 runs on the processor 1.0 GHz Cortex-A8, TI OMAP 3630 with Dual-core . It has internal memory 2GB and RAM (RAM) 512MB and supports microSD, up to 32 GB (dedicated slot). This model also has 3.5mm jack, supports Bluetooth version 2.1, A2DP, EDR and GPS technology Yes, with A-GPS . The USB port supports microUSB 2.0 and Wi-Fi802.11b/g/n, Wi-Fi Direct, DLNA, hotspot. Its technical characteristics are also the screen size 4.0 in, 45.5 cm2 (~58.3% screen-to-body ratio), the resolution 480 x 800 pixels 5:3 ratio (~233 ppi density) and the type IPS LCD capacitive touchscreen.

Model and Features
Model	LG KU5900
Series	Optimus Black
Release Date	May, 2011
Body Depth	9.2 mm (0.36 in)
Body Dimensions	122 x 64 mm (4.80 x 2.52 in)
Body Weight	112 g (3.95 oz)
OS	Android 2.2 (Froyo), 2.3.4 (Gingerbread), upgradable to 4.0 (Ice Cream Sandwich)
Hardware
CPU	1.0 GHz Cortex-A8, TI OMAP 3630
CPU Cores	Dual-core
RAM	512MB
Internal Memory	2GB
External Memory	microSD, up to 32 GB (dedicated slot)
Network and Data
SIM	1 Mini-SIM
2G bands	GSM 850/900/1800/1900 MHz
3G bands	HSDPA 900/1900/2100 MHz
4G bands	-
5G bands	-
Technology Data	GPRS/EDGE
Display
Screen size	4.0 in, 45.5 cm2 (~58.3% screen-to-body ratio)
Type	IPS LCD capacitive touchscreen
Resolution	480 x 800 pixels 5:3 ratio (~233 ppi density)
Colors	16M colors
Battery and Keyboard
Battery	Removable Li-Ion 1500 mAh
Physical keyboard	-
Interfaces
Audio output	3.5mm jack
Bluetooth	version 2.1, A2DP, EDR
DLNA	Yes
GPS	Yes, with A-GPS
Infrared port	No
NFC	No
USB	microUSB 2.0
WLAN	Wi-Fi802.11b/g/n, Wi-Fi Direct, DLNA, hotspot