Lock your phone's screen orientation
To lock your screen orientation, double tap the home button and swipe to the right. You'll see a gray circle opposite the rewind button.
Tap that one time and a lock will appear. Now when you turn your phone sideways the orientation will stay put.
Set an alphanumeric passcode
Setting an alpha numeric password can add an extra layer of protection to your phone.
To enable, first head to Settings.
Next, tap general, navigate to the middle of the page, and select passcode lock.
Turn "Simple Passcode" off and you will be prompted to enter your alpha numeric password.