Samsung SEG-I9020PWATT - Manual (Page 14)

Your phone and accessories 14
NSOG-A-1.1-100 Nexus S Owner’s Guide
Turn off the phone
1 Press and hold the Power button until a menu opens.
2 Touch
Power off in the menu.
3 Touch
OK when asked to confirm that you want to turn off the phone.
For more about working with the touchscreen and menus, see the Android User’s
Guide.