What is bluejacking?

Bluetooth is a radio wireless technology that allows computers, cell phones, laptops, etc. to exchange or talk to each other in a limited range. Bluejacking is the term based on two words — bluetooth and hijack. It refers to sending unnecessary and anonymous messages by using bluetooth enabled devices as a contact. In order to carry out bluejacking, both devices should be bluetooth enabled and should be within 10 metres of each another. Phone owners who receive bluejack messages should refuse to add those contacts to their address book.