Enable Barcode Scanner (Android Version 9)

Open Android Settings > Scanner Settings > Scanner configuration > Barcode scanning (tap to enable) User Manual

Enable Barcode Scanner (Android Version 11)

1. Settings.

2. Advanced Features.

3. Barcode scanner settings.

4. Scanner Configuration > General > Decoding Mode > Change to ISO-8859-1 from AUTO.

5. Scanner Configuration > General > Scan results Send mode > The focus of the input.

The two scan keys are located on either side of the device, at the bottom middle.