how can i install os in my samsung s3

[Ravi_50]

i want to install os in my samsung s3

 

[Saga Lout]

Power it off by holding the power button down for a while then when you power up again, press the Volume Down button as the same time as the power button.

You'll see a menu of Recovery Options and you choose by scrolling using the volume up and down buttons and the power button to select your choice.

It will eradicate all you files and settings.