Existing users, 
Software-based unlock for iPhone 1.1.3, step-by-step instructions
Posted 8 February 2008 @ 5am in Guides/How-Tos
George Hotz has released what is, as far as we know, the first software-based mechanism for unlocking the iPhones running software/firmware 1.1.3 for use on unauthorized wireless carriers. Hotz is the Glen Rock teen that delivered the first hardware-based iPhone unlock in August of last year.
The new unlock method is not for the faint of heart and requires modifying your iPhone’s baseband — a procedure that can genuinely brick the device, rendering it (at least temporarily) non-functional. We certainly don’t recommend it. There are step-by-step instructions here, which are Windows-based but can be easily modified for performance on a Mac OS X system. Although the steps are listed as for 1.1.2, they also work with software/firmware 1.1.3.
If you have trouble downloading the listed, necessary files, they are also available here.
If you need the iPhone 1.0.2 firmware (required by these instructions), here it is.
Feedback? info@iphoneatlas.com.
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1 Comment
Posted by rg2
8 February 2008 @ 9am
So, it’s still not actually an unlock for 1.1.3! I wish you guys would get this straight. If you have to downgrade to a previous fw version, it’s an unlock for that version. It’s really quite simple.