There is currently no untethered jb for ios 6. There is only tethered jb available for 6.0.1, and only for pre-A5 devices. The untethered for 6.0.1 is currently only available for iphone 3gs with old bootrom.
willerz2 said:And a selective bunch of new bootrom.
alifkm2 said:What Jon mention about the "selective bunch" might be true. Last 2 weeks i jailbroke my iphone4 on 6.0.1, the first time i reboot it, it works like an untethered, everything works, but the second time i reboot, it needs to be boot tethered because the phone keeps restarting non-stop by itself. And now im running on stock 6.0.1 since i cannot use mobile banking on jb-ken devices.
Old bootroms were termed for 2009 39th week (XX939XX...), and new bootroms are officially 2009 45th week (XX945XX...). 40-44 are still MC models, but are vulnerable to the 24kpwn exploit.
And a selective bunch of new bootrom.