How to Hard/Factory Reset | Bypass screen lock on LG LS840?

Overview

LG LS840 runs on the processor 1.2 GHz Qualcomm Snapdragon S3 MSM8660 with Dual-core . It has internal memory 4GB and RAM (RAM) 1GB and supports MicroSD, Up to 32 GB. This model also has 3.5mm jack, supports Bluetooth version 3.0, A2DP and GPS technology Yes, with A-GPS . The USB port supports microUSB 2.0 and Wi-Fi802.11b/g/n, Wi-Fi Direct, hotspot. Its technical characteristics are also the screen size 4.0 in (~62.8% screen-to-body ratio), the resolution 480 x 800 pixels (~233 ppi pixel density) and the type TFT capacitive touchscreen.

SpecificationLG LS840Viper LTE

Model and Features
Model	LG LS840
Series	Viper LTE
Release Date	April, 2012
Body Depth	11.7 mm (0.46 in)
Body Dimensions	117 x 62 mm (4.61 x 2.44 in)
Body Weight	142 g (5.01 oz)
OS	Android 2.3 (Gingerbread)
Hardware
CPU	1.2 GHz Qualcomm Snapdragon S3 MSM8660
CPU Cores	Dual-core
RAM	1GB
Internal Memory	4GB
External Memory	MicroSD, Up to 32 GB
Network and Data
SIM	1 Mini-SIM
2G bands	-
3G bands	-
4G bands	LTE band 25(1900)
5G bands	-
Technology Data	-
Display
Screen size	4.0 in (~62.8% screen-to-body ratio)
Type	TFT capacitive touchscreen
Resolution	480 x 800 pixels (~233 ppi pixel density)
Colors	16M colors
Battery and Keyboard
Battery	Removable Li-Ion 1700 mAh
Physical keyboard	-
Interfaces
Audio output	3.5mm jack
Bluetooth	version 3.0, A2DP
DLNA	Yes
GPS	Yes, with A-GPS
Infrared port	No
NFC	Yes
USB	microUSB 2.0
WLAN	Wi-Fi802.11b/g/n, Wi-Fi Direct, hotspot