Basics26Turning the device on and offPress and hold the Power key for a few seconds to turn on the device.When you turn on your device for the first time or after performing a data reset, follow theon-screen instructions to set up your device.To turn off the device, press and hold the Power key, and then tap Power off.Follow all posted warnings and directions from authorized personnel in areas wherethe use of wireless devices is restricted, such as airplanes and hospitals.Restarting the deviceTo restart the device, press and hold the Power key, and then tap Restart.If your device is frozen and unresponsive, press and hold the Power key and the VolumeDown key simultaneously for more than 7 seconds to restart it.Power keyVolume Down key

Samsung SM-J810M/DS User Manual