guys this is my second 3GS. I have jb/unlocked my first one to 4.0 without any troubles. this one had updated itself legally to 4.0 when i left it connected to itunes. now it refuses to JB. infact its even refusing to downgrade. I tried every version i had 3.1.2, 3.0,4.0....everythin...iam so pissed off...dont even remember how many times i done/redone all this on this particular fone...its in deep **** i guess. it was on 4.0 and it could not activate as it kept sayin it needs t original SIM. i do not have one. not even a fonebook sim to activate it as shown when i googled. so had to use t ipsw thru redsn0w....it comes up with 1601,1604 errors...it also came up wit 3194 once. please help...i dont want leave it as a brick...lemme know if u need any more info...can t shsh blobs not being saved be t prob?