the camera is a wonderful tool for interacting with your customers. you can instruct audience members to take a picture of a specific object or graphic and then instruct them to e-mail or text(via MMS)the picture to you mobile marketing program.when your program receives a picture,it processes the picture and then opts the mobile subscriber in to the program.the process is also enhanced with services like 2d her codes. see chapter 5 for more on these emerging technologies