The French iOS hacker extraordinaire Pod2g, who developed Apple iOS 5 untethered jailbreak exploits has found a severe SMS flaw in iOS which already exists since the initial release of iOS SMS text message function until the latest iOS 6 beta 4. It is believed other iOS security researchers and even pirates already know about this hole due to its long existence in iOS.
Pod2g explains:
"If you either own a smartphone, or a modem and an account in a SMS gateway, you can send texts in raw PDU...