In flight mode the connection to the network is deactivated, so as not to cause interference with sensitive equipment, on a plane or in a hospital, for example.
You can still use the calendar, play games etc. Follow these instructions to activate or deactivate flight mode on your Apple iPhone 3GS.
- Find Settings
- Activate or deactivate
Press the box next to Airplane Mode
When ON is displayed, flight mode is activated
Press the Home key to return to standby mode