Samsung SPH-L710RWBVMU - Manual (Page 15)

Turn your Phone On
Use the Power/Lock Key to turn your phone on or off, to lock the screen or display the lock
screen, and to access the Device options menu.
■ Press the Power/Lock Key to turn the phone on.
 If your phone is activated, it will turn on, search for service, and begin the setup
application.
 If your phone is not yet activated, see Activate Your Phone for more information.
Get Started 4