It’s been a very tough week for some of you jailbreakers. To clear up what’s going on 4.2.1 is live and jailbreakable on all idevices using redsn0w 0.9.6b5. For those of you having a hard time on upgraded basebands on your iPhone 4 pass 1.59.00 there is no carrier unlock currently. However for those on you on upgraded 5.13.04 & 5.14.02 on your 3G & 3G(S) you can know unlock and jailbreak with ultrasn0w 1.2. Please be aware this requires you to upgrade your iphone to the iPads baseband using redsn0w to 6.15.00. You won’t be able to install stock firmwares just custom Ipsw so only use if you have no choice.