Samsung galaxy grand prime User Manual page 18

Setup Screens for details.
If your phone is not yet activated, see Activate Your Phone for more information.
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Turn Your Phone Off
1. Press and hold the Power key to open the phone options menu.
2. Tap Power off > POWER OFF to turn the phone off.
Your phone will power off.
Your screen remains blank while your phone is off (unless the battery is charging).
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