How to hard reset my iphone 4?

How to hard reset my iphone 4?

You first shut it down, then power it up. When powering up, hold the home button. An itunes logo and the 30-pin connector should come up on screen. After this, plug the usb FIRST to a computer which has itunes in it. Then plug the 30-pin to your phone. Go to the top right corner and you can see a button that looks like a phone. Click on it and click on the restore and update button. It should start reseting after.