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perhonen
May 7, 2007
My friend has an Iphone 3GS running a pre-4.0 firmware, unlocked and jailbroken. He wants to upgrade to a 4.0+ firmware. What is the best way to go about this? If I upgrade through itunes, then jailbreak it, would he lose his unlock? I went to caniunlock.com and it looks like he would be eligible for the unlock.

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