How to Hard/Factory Reset | Bypass screen lock on Samsung SPH-M840?

All tutorials for Samsung SPH-M840

How to Hard Reset on Samsung SPH-M840?

Make sure you turned off your phone. Hold down the Power key, the Volume Up key and the Home Button for a while. Wait until the Samsung or Android logo appears. Release all the buttons. Now, you'll see...

How to Factory Reset through menu on Samsung SPH-M840?

The device must be on. Go to the "Settings". In Settings choose "Backup & Reset". After that, go for "Factory data reset". Press "Reset device" to finish...

How to Flash Stock Firmware on Samsung SPH-M840?

First, download to your PC: Odin3 latest version, Firmware, Samsung Kies, and Samsung Drivers: Samsung Kies Odin3 latest version Samsung Drivers With the phone turned off press and hold the Volume down key, the...

Top 5 secret codes for Samsung SPH-M840

The first is :*#7353*#. Use this code to open the Quick Test menu that allows you to test different options of your device. The second is :*#0*#. Use this code to enter the General Test Mode where you can test...

Enable Developer mode & USB debugging on Samsung SPH-M840

Turn on your device and open "Settings". In Settings select "About Phone". Click on "Build number" seven times and go back to "Settings". Finally, select Developer...

How to take screenshot on Samsung SPH-M840?

The device must be switched on. Choose what you want to capture. Then press the Power key and the Volume down button at one time. Great! Now you have a new screenshot.

Overview

Samsung SPH-M840 runs on the processor 1.4GHz Qualcomm MSM8655 Snapdragon S2 with Single-core . It has internal memory 4GB and RAM (RAM) 512MB and supports microSDXC (dedicated slot), 2 GB included. This model also has 3.5mm jack, supports Bluetooth version 4.0, A2DP and GPS technology Yes, with A-GPS . The USB port supports microUSB 2.0 and Wi-Fi 802.11 b/g. Its technical characteristics are also the screen size 4.0 inches, (~58.8% screen-to-body ratio), the resolution 480 x 800 pixels, (~233 ppi density) and the type Capacitive touchscreen.

SpecificationSamsung SPH-M840Galaxy Prevail 2

Model and Features
Model	Samsung SPH-M840
Series	Galaxy Prevail 2
Release Date	July 2013
Body Depth	12.7 mm (0.5 in)
Body Dimensions	122 x 63.5 mm (4.80 x 2.5 in)
Body Weight	130.4 g (4.59 oz)
OS	Android Jelly Bean 4.1.2
Hardware
CPU	1.4GHz Qualcomm MSM8655 Snapdragon S2
CPU Cores	Single-core
RAM	512MB
Internal Memory	4GB
External Memory	microSDXC (dedicated slot), 2 GB included
Network and Data
SIM	1 Mini-SIM
2G bands	CDMA 800/1900
3G bands	CDMA2000 1xEV-DO
4G bands	-
5G bands	-
Technology Data	CDMA/EVDO
Display
Screen size	4.0 inches, (~58.8% screen-to-body ratio)
Type	Capacitive touchscreen
Resolution	480 x 800 pixels, (~233 ppi density)
Colors	16M colors
Battery and Keyboard
Battery	Removable Li-Ion 1750 mAh
Physical keyboard	-
Interfaces
Audio output	3.5mm jack
Bluetooth	version 4.0, A2DP
DLNA	-
GPS	Yes, with A-GPS
Infrared port	-
NFC	-
USB	microUSB 2.0
WLAN	Wi-Fi 802.11 b/g