From the main screen, press the MENU key, then tap "System settings."
Slide your finger up the screen to display more options, then tap "Accessibility."
Tap "Auto-rotate screen."
If the checkmark is blue (selected), the interface will rotate when you hold the phone horizontally. If it is not selected, the interface will always stay in portrait mode.
Note: Some applications cannot rotate and will not change when you hold the phone horizontally.
To return to the main screen, press the HOME key.
I'm interactive.Click my buttons.