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When turning on Galaxy S4 for the first time, follow the on-screen instructions to set up your device.
Press and hold the Power button for a few seconds to turn Galaxy S4 on and off.
- Follow all posted warnings and directions from authorised personnel in areas where the use of wireless devices is restricted, such as aeroplanes and hospitals.
- Press and hold the Power button and tap Flight mode to disable the wireless features.
To turn off Galaxy S4, press and hold the Power button, and then tap Power off.