The Navigation Buttons

To the left of the Keypad,, there are four arrow buttons with an OK button in the middle and an X button below. These are your navigation buttons. They work differently, depending on what is showing on the display.
The four arrow keys are used to scroll through information when it is presented on the LCD Screen.
The OK button is used to confirm actions or answer incoming calls.
The X button is used to cancel an action or reject incoming calls.