Business card scanner applications serve the easiest way to convert the business card details to phone contacts. They use the advanced image processing techniques followed by OCR (optical character recognition) techniques. Here is one Android application which captures the visiting card and identifies different fields by itself and populates the details which can be saved as a contact with just a click.
Business cards reflect the nature of business you do. Including a QR code in the business card enables the card to hold more information which can be easily read by smart mobile devices without even requiring any network availability. Reserving a small area on business card for a QR code will insert a huge amount of valuable information to your card which can be a boon to extend the business.