Can you downgrade the iphone from 1.1.2?

i have the iphone that be sold past week 45 and have firmware 1.1.2.

i was wondering if nearby is a way to downgrade the iphone so i can unlock it and use it on any cellular see

could you give me the instructions or only just a simple yes or no and a link to a website

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Answers:    http://www.ghacks.net/2007/10/01/downgra...

this may back.

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