iPhone Dev Team and Chronic Dev Team issued some messages on Twitter that there, is a security hole in new iOS, which using an exploit of the boot ROM, allowed to perform the jailbreak. The posted messages are the following : cpich3g: congrats to @ pod2g for the latest exploits And Also @ p0sixninja Who Have Been Trying for months. pod2g: IPhone 4G 4.0.1 IBSS : iv = key = 91f94e5d726a2d2f2c7ffad58d4f3b77 d05c3c40db40e738926f811b8b1314038d26096c4102461698a49098c47a3fe6 MuscleNerdCrazy timing @ pod2g That just got latest exploits as 4.1 Went public ( lots of work left … keep away from 4.1 for now! ) With subsequent final confirmation: pod2g: Works on 4.1 ( !) IBSS iv = key = c2c5416472e5a0d6f0a25a123d5a2b1c 1fbc7dcafaec21a150a51eb0eb99367550e24a077b128831b28c065e61f894a0 The jailbreak iOS 4.1 turns out to be good news for all those who were “arrested†by Apple‘s solution to hacking on the web via jailbreakme.com. Unlike jailbreakme.com method, which exploited a security flaw in how Safari for iPhone managed PDF files, jailbreak it marks a return to the times when the Dev Team forced the iPhone file system via ROM boot. Citing MuscleNerd and his tweets, there is still much work to do and will take some time before the utilities to jailbreak iOS 4.1 is disseminated to the public.