12-05-2009 11:11 PM
It can't. BlackBerry Messenger messages only travel via PIN.
So, who else had your device? Or your friend is confused.
Anyway, ask the friend to see the message, check the senders profile and PIN, is it yours?
PIN: C0001B7B4 Display/Scan Bar Code
PIN: C0005A9AA Display/Scan Bar Code