I lost my ipod touch a while ago, and as a result, stopped staying up to date on new jailbreak methods. However, I'm thinking about getting a new iPhone/iPoT and I want to know which iDevices can't be jailbroken. I've heard that OTB 3.1.3 iPhone 3GS can't be jailbroken because of the new bootrom, and upgrading to 3.1.3 pretty much screws you over. Is 3.1.2 only a tethered jailbreak? And why can't one just downgrade from a 3.1.3 OTB and jailbreak as usual? if you could tell me which versions are jailbreakable, on a Mac, I'd really appreciate it. Thanks!