iPhone 3GS 4.2.1 jb'ed, can I jb to 5.0.1?

i have iphone 3gs 4.2.1 jailbroken baseband of 05.15.04. can jb 5.0.1 now? unlock?

please advise. thank you!

 

you upgrade 5.0.1 use redsn0w 0.9.10b4 jailbreak.

if want unlock phone, have install ipad bb, lose gps.

 

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