jailbreak&unlock iphone 3g..help please

jailbreak&unlock iphone 3g..help please Hi’ I have Iphone 3g on 3.1.2 jailbroken and unlocked on baseband 04.26.08 and I want to upgrade to 4.0.1 Can anyone tell me how can I do it and how can I jailbreak&unlock after the upgrade. Thanx.

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Source: http://www.xdadroid.com/2010/11/13/jailbreakunlock-iphone-3g-help-please/