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Hy,
i have iphone 3g on ios 3.1.3 and i wanna update it to ios 4.2.1. My baseband is 06.15.00 is there any way to update it without downgrading baseband? I was watching videos on youtube where i can use redsn0w to downgrade baseband but when i wanna use 3.1.3 firmware i get error on redsn0w...