I'm developing an application which is going to send jpg's images to cellphones. I need to know if 1 single dongle can connect simultaneously with several phones. I red that 1 USB dongle can manage up to 7 connections simultaneously, but it dosent say if those connections can be from the same profile, in this case OBXftp.

If this is not possible I intend to connect 4 USB BT dongles to the same PC. The thing is I'm working with Linux. When I connect all four the program always tries to connect to the first of the list (hci0), and never uses the 3 remaining.
Can I tell linux to use all 4 at the same time?

I'm using bluezspammer.

Any help would be appreciated.