Your Android Tympa device may enter a managed device Kiosk mode. This means that access to Settings will not be visible.
These steps will help you to exit the simplified 'Kiosk mode' and allow you to access settings such as WiFi.
1. On the device Home screen - repeatedly press the < back arrow key (bottom right).
2. Select 'exit kiosk mode' from the menu which pops up.
3. Enter the PIN of 239910.
The phone will have exited kiosk mode and be able to make changes in settings.
Please tap on the icon for the “Managed Home Screen” (in the Samsung folder) and you will be taken back to the Kiosk mode.