Reading from http://developer.android.com/guide/topics/wireless/bluetooth.html,
The current Android Bluetooth API’s require devices to be paired before an RFCOMM connection can be established. (Pairing is automatically performed when you initiate an encrypted
connection with the Bluetooth APIs.)
However, to my knowledge, the Bluetooth protocol allows .vcf (vCard) files to be sent without having paired two devices. This is what makes Bluejacking possible on older phones like Sony Ericsson k7** series, Nokia 63** series etc.
In the interests of writing an android bluejacking application I would like to be able to send vCard files from Android without having to first pair with the device. Does anyone know if this is possible?
Bluejacking is really only sending unsolicited messages to other bluetooth users. Which is usually confused with Bluesnarfing. Most of the older phones I have worked with in android do not even have Bluetooth discovery turned on which is really the only way someone can do Bluejacking, if they aren’t already paired with your phone, they have to see your bluetooth before they can send it. Usually this discovery mode is only on for 2 minutes , once selected. Newer phones its a little easier with the easy pairing but I’ve still had issues making connections.