After the registration process, download the APK here and save into usb pen.
Enable third part applications installation in your android player: go to Menu➡Settings➡Applications➡Enable unknown sources.
Insert the usb pen in your device and install the application.
Once the installation is completed lLaunch WallSign application and after few seconds you should see an activation phrase.
That phrase must be placed on the WallSign dashboard: login to app.wallsign.eu, go to the Player section and press Add button, selecting WallSign.
The application will start automatically on reboot.
Remember to set the right time zone from the settings.