Flight mode

Offline mode (flight mode) disables all call and messaging functions on the Samsung device. It also disables all network connections such as mobile data, WLAN and Bluetooth. When offline mode is activated, WLAN and Bluetooth can be reactivated. When flight mode is activated, it is visible with the aircraft symbol in the status bar.

Note: Offline mode can also be switched on/off via the quick settings.

Android 10 (One UI 2.0)
Step 1:  Open the  Settings
Step 2:  Tap on  Connections
Step 3:  Enable or disable  Flight mode
  1. Open the Settings
  2. Tap on Connections
  3. Enable or disable Flight mode