Samsung SCH-R710XKBCRI - Manual (Page 18)

14
Locking and Unlocking the Screen
By default, the phone locks automatically when the backlight goes
off, or you can lock it manually.
Note: You can choose to disable automatic screen locking. For more information,
see see “Phone Settings” on page 88.
Locking the screen manually
ᮣ Press the Lock / Voice Service key. The lock screen
displays briefly.
Unlocking the screen
ᮣ Press and hold the Lock / Voice Service key.