The underground hacker team "web-Hack" from Russia released a whitepaper with results of iPhone firmware research where they reverse-engineered embedded functions. They claim discovery of a built-in function which sends all data from an iPhone to a specified web-server. Contacts from a phonebook, SMS, recent calls, history of Safari browser - all your personal information - can be stolen. Researchers assume that this function either a debug feature or a built-in backdoor module for some government agencies. The reported function can be used by a trojan-developers or activated by AT&T. Remember, AT&T has already backdoored all Internet traffic traversing their infrastructure for the NSA.