- iTunes upgrade to newest
- iPad connect to pc and backup
- download {iPhone2,1_4.2.1_8C148a_Restore.ipsw}
- download {redsn0w.exe version 0.9.6rc8}
{tS4z,%P=)oU;2s5*L9_-SG<764zfv@ZnffoupE*!uy]XN!V?GD%vdI%h~p]1qt!v#G$K[ehusNQ,MS_(G*Z$6+iY$+3ZF2TOt
other step as ipad-ios-421-8c148-jailbreak-by-redsn0w.html the same