Airplane mode will disable all wireless services on the device. Calls, data, and text messages cannot be sent or recieved. Disable Airplane mode to restore regular device function. From the home screen, select Settings.
Select the Airplane Mode slider to turn it on or off.
When airplane mode is on, the Airplane icon will be displayed in the Notification bar. Note: Learn more from Apple support article: Use Airplane Mode on your iPad
Airplane Mode can also be accessed from the Control Center by swiping up from the bottom of the screen, and then selecting the Airplane mode icon.