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 remaining functions when flight mode is activated, but you cannot send messages or make calls.
Follow these instructions to activate or deactivate flight mode.
Activate or deactivate
Press and hold Disconnect
Press Airplane mode
Depending on the current settings, flight mode is now activated or deactivated
If you deactivate flight mode:
Press and hold the Key lock key to deactivate the key lock
Key in the PIN (default is 00000) and press OK