Locking the screen orientation: The display switches between portrait and landscape mode while lying in bed or bending to show one of his friends something. If you want the screen to keep it as is, without changing while moving with your phone can double tap the home screen button to open the Windows system tray, slide to the left and find the orientation lock option and you can choose to enable or disable.
Take a screenshot: If you have one of your friends or watch a movie or even want to share a photo simply take a screenshot of the iPhone screen. Just push the button and the button on the home screen while and save a picture of something. It works anywhere on the screen of your phone or anything when running on the iPhone, even if it's a game or an application.
Lock your phone with a password: Just go to Settings, then choose General, scroll down to find the code. Once you switch, you are prompted to enter the access code you want, but make sure you enter a number that is saved well. The phone has all passwords and private emails are the most important social networks and open 24/7 so you must make sure that nobody is going to pick up the phone and play with it.