If you want to be able to read mobile QR codes, you'll need a reader. All these readers are free, just pick the one that best matches your phone.

Neo Reader supports the iPhone, all Windows Mobile, Blackberry, and the Nokia N and E series smartphones, as well as other Symbian devices and most other phones.
Get Neo Reader >

Quickmark supports smartphones, including the iPhone, Blackberry, Symbian and Windows Mobile.
Get Quickmark Reader >

UpCode is suitable for Symbian, UIQ, windows mobile and Java phones
Get UpCode >

For more details on QR codes and readers , please visit the website, www.passionpitmusic.com/littlesecrets