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In flight mode all wireless connections are turned off, so your phone can’t cause any interference with sensitive equipment in a plane or a hospital. You can still use your phone when flight mode is turned on, but you can’t send messages or make calls. Follow these instructions to turn flight mode on or off.
Find "Network Connections"
Slide your finger down the display starting from the top edge of your phone.
Press Network Connections.
Turn flight mode on or off
Press the indicator next to Flight Mode to turn the function on or off.
Slide your finger up the display starting from the bottom edge of your phone to return to standby mode.