Well Something About Bluetooth
Many of the most popular models of Bluetooth-enabled cell phones can be hacked easily, enabling a malicious hacker to steal phone books, images, calendar information, or virtually anything else stored on the phone, say a pair of security experts.
three different ways to attack a phone: He could send unsolicited text messages to the phone's screen, download all the data stored on a phone (or manipulate the data on the phone itself), and turn the phone into a roaming bug by forcing a targeted phone to call another phone.
This last attack, which the pair call "BlueBugging," is potentially the most damaging because once the attacker initiates a call on the victim's phone, there's no need to stay within Bluetooth range, typically about 30 feet. The target need only be in a phone service area to be exploited.
Source
*www.pcworld.com/news/article/0,aid,117203,00.asp