Phone DDOS research. Current proof of concept is dealing with Samsung SCH-U365 QUALCOMM prepaid Verizon phone custom firmware was written that makes it into an anonymous DOS systems It Does PRL list hopping and several other interesting evasion methods. The new firmware allows two features one, you text it a number and it will spam call that number 70 times a min. till battery dies. All for 2 dollars a day. And second feature is that if a number that is in address book calls it, automatically picks up on speaker phone. Also ways to mitigate this attack with load balancing Call manager and Captcha based systems.