What is needed to jailbreak or unlock the iPhone?
#2 Computer with a USB port, the USB cable that came with your iPhone.
#3 iTunes 7.5 and later on your computer.
If you have all of that, you can begin. Note: Windows 2000 and older Microsoft operating systems powered computers are not supported. And a lot of Mac unlock programs don’t support PowerPC’s.
Next iPhone hacking guide: Can your iPhone be unlocked (easily)? Checking iPhone firmware version.
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