Helen Keegan at Musings explains how Coca Cola is using QR codes for a mobile marketing and m-commerce.
Coca Cola uses the mobile phone as a loyalty point system for their Cmode mobile-enabled drinks vending machines in Japan. consumers can use NFC (near field communication) or a QR code generated by an application installed on their phone to purchase drinks at Cmode vending machines.
For each purchase, consumers earn loyalty points which are stored on their mobile phone. As the number of loyalty points increases, the consumer's loyalty ranking 'levels up' and the number of loyalty points earned per drink purchased also increases.
Consumers can redeem loyalty points as free drinks at a vending machine, or on digital content such as screensavers and wallpapers at the Coca Cola mobile site