open iTunes
plug in iPhone
wait till iTunes connects with iPhone
if iPhone is in sleep mode wake it up
press home and sleep button simultaneously until you hear iTunes recognize it
let go of the sleep button only (right after you hear iTunes recognize it)
wait about 20 seconds with home button pressed
iTunes will detect phone in DFU mode
let go of home button and your done!
screen should be black
if its not all black then you did it wrong
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3G iPhone 8GB (soon to be unlocked, hopefully)
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