Zte A39 User Manual page 19

End key
Finish or refuse a call. Power on/off. Return to standby mode in the menu
interface.
Up/Down/ Left/Right/OK key
Up/Down key: Used for scrolling up and down in the phone number list or setting
options. Used as shortcut key in standby mode.
Left/Right key: Move the cursor left and right when editing. They could be set as
shortcut keys in standby mode.
OK key: The middle key within the navigation keys. Usually used to confirm
actions/make selections.
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