You can replace or modify the victim mobile phone's address book by using the following steps:- (a) Create a new address book entry. Try to keep the list of contact names same as in victim's address book. If you have no idea about victim mobile phone's address book then try some common words like Work or Office or Mobile or Home etc...(Whatever in your mind....) (b) Sent this newly created address book to the victim mobile phone via Blue tooth. (c) As soon as the victim accepts the blue tooth message, it shall replace the existing entry with the new information. This is also know as "Blue Jacking" or simply a "Blue Jack Attack" Related Software : Free Jack. Source : http://www.software13.co.uk/freejack/