How to factroy restore and boot your android samsung GALAXY S4

This technique applies for most of the Samsung Smartphone and

some of the android platform mobile device. there are many ways to check android device.
See how to Use your android Phone

Now first of all switch off your Mobile device

Press and hold Mobile home key with one thumb and press high volume up and switch on your mobile

In the meanwhile device power beeps and goes to Black screen mode

Scroll down using Volume key to select the option to boot,

apply update of factory restore

apply update from SD card

wipe clean factory restore

select it

You let it for a while for process the job for system

it comes to normal stage after a while
You can also connect your android device to pc and laptop

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