jailbreak for IOS 4.2.1 available

gp_mac_rc5_b4 untethered jb released on 03/02/2011  @ http://greenpois0n.com/

as usual i waited a few days before upgrading …

first i did the normal upgrade to 4.2.1 with itunes. after booting 4.2.1 the cydia stuff was gone, but the installed apps from installous were still there (the apps did not start). now the greenpois0n jb – needed a lot of tries; it works after starting the tool via console *confused. after reboot i could install cydia and the rest of needed software, the apps from installous are working now, itune sync works, openvpn works – all good ! thx to the jb guys