Bluebugging

Similar to bluesnarfing, bluebugging accesses and uses all phone features[1] but is limited by the transmitting power of class 2 Bluetooth radios, normally capping its range at 10–15 meters.

[2][3] Bluebugging was developed by the German researcher Martin Herfurt in 2004, one year after the advent of bluejacking.

[2] Initially a threat against laptops with Bluetooth capability,[4] it later targeted mobile phones[5] and PDAs.

Once control of a phone has been established, it is used to call back the hacker who is then able to listen in to conversations, hence the name "bugging".

Not only can a hacker receive calls intended for the target phone, they can send messages, read phonebooks, and examine calendars.