Tienes que quitar el Factory Mode. El factory Mode tiene 3 cosas que cambia del Normal Mode:
1- la pantalla de bloqueo desaparece
2- El menú que te falta a ti del apagado
3 - aparece el cartelito amarillo que pone Factory Mode.
Hay varios tutos que te explican como quitarlo con la app terminal Emulator. Lo quitas, y ya verás que te aparecerá el menú. No hace falta restaurar ni flashear nada
"Here is the exact solution for this problem which i have recently had!
You have to root your phone and install Terminal Emulator from Google Play.
Open terminal emulator and type as ;
su
rm /efs/FactoryApp/keystr
rm /efs/FactoryApp/factorymode
echo -n ON >> /efs/FactoryApp/keystr
echo -n ON >> /efs/FactoryApp/factorymode
chown 1000.1000 /efs/FactoryApp/keystr
chown 1000.1000 /efs/FactoryApp/factorymode
chmod 0744 /efs/FactoryApp/keystr
chmod 0744 /efs/FactoryApp/factorymode
reboot
You now should not see the that message anymore. Its because of an EFS corruption. ( Thanks to yesilcin*com) for exact solution.
Hope it helps!!!"