If your mobile carrier (MC) can tell that you shopped at merchant A and merchant B who are competitors, can the MC sell that intel (minus the actual personal PMI info) to those merchants? You're the target for posting real-time "value add services" to your device. Do you feel that's invasion of your privacy? Note that financial targeting of mobile devices (in lieu of your email address) is driving innovation (funding it) much like Google data mining pays for broadband advancements. Not only phones, but now your TVs, media centers, etc. are also targets.