How to Hard/Factory Reset | Bypass screen lock on LG T540?

Overview

SpecificationLG T540Magna

LG T540 runs on the processor 1300 MHz ARM Cortex-A7 with Quad-core . It has internal memory 8GB and RAM (RAM) 1GB and supports microSD, microSDHC, TransFlash up to 32 GB. This model also has 3.5mm jack, supports Bluetooth version 4.1, A2DP, LE and GPS technology Yes, with A-GPS, Geotagging, S-GPS, QuickGPS . The USB port supports microUSB 2.0 , USB charging and Wi-Fi802.11b/g/n, Wi-Fi Tethering. Its technical characteristics are also the screen size 5.0 in (~70% screen-to-body ratio), the resolution 720 x 1280 pixels (~294 ppi pixel density) and the type IPS TFT LCD.

Model and Features
Model	LG T540
Series	Magna
Release Date	June, 2015
Body Depth	10.2 mm (0.40 in)
Body Dimensions	69.8 x 139.7 mm (2.75 x 5.50 in)
Body Weight	135 g (4.76 oz)
OS	Android 5.0.x Lollipop
Hardware
CPU	1300 MHz ARM Cortex-A7
CPU Cores	Quad-core
RAM	1GB
Internal Memory	8GB
External Memory	microSD, microSDHC, TransFlash up to 32 GB
Network and Data
SIM	1 Micro-SIM
2G bands	GSM 850/900/1800/1900 MHz
3G bands	UMTS 850/900/1900/2100 MHz
4G bands	-
5G bands	-
Technology Data	GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+
Display
Screen size	5.0 in (~70% screen-to-body ratio)
Type	IPS TFT LCD
Resolution	720 x 1280 pixels (~294 ppi pixel density)
Colors	16M colors
Battery and Keyboard
Battery	Removable Li-Ion 2610 mAh
Physical keyboard	-
Interfaces
Audio output	3.5mm jack
Bluetooth	version 4.1, A2DP, LE
DLNA	No
GPS	Yes, with A-GPS, Geotagging, S-GPS, QuickGPS
Infrared port	No
NFC	No
USB	microUSB 2.0 , USB charging
WLAN	Wi-Fi802.11b/g/n, Wi-Fi Tethering