Samsung SPH-A523HBASKE - Manual (Page 94)

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Last Key — Press to enter a zero (0), or to select a numbered
menu item.
Pound/Space Key — Press to insert a space when entering
text or to move to the next page of a multiple-page display.
Number 1 thru 9 — Use the number keys to select items in a
menu if they are numbered.
End Key — Press to exit SURF and return the device to
standby mode.
Left Soft Touch Key — Press to activate the command that
appears above it in the display.
Right Soft Touch Key — Press to activate the command that
appears above it in the display.