This feature allows you to contact candidates faster. When you scan the QR code, you can instantly see the phone number on your phone and start the phone call.
If your phone cannot read QR codes you have to download a QR code reader application. There are plenty of free applications available on app stores.
In order to scan the QR code, open the application and click on the candidate’s phone number to see the QR code pop-up. Hold your device steady for 2-3 seconds towards the QR code you want to scan. Your device will recognize the QR code and open an option to dial the number.