Wired.com reports that serious flaws discovered in Bluetooth technology used in mobile phones can let an attacker remotely download contact information from victims' address books, read their calendar appointments or an attacker could even plant phony text messages in a phone's memory, or turn the phone sitting in a victim's pocket or on a restaurant table top into a listening device to pick up private conversations in the phone's vicinity. Most types of attacks could be conducted without leaving a trace.