GeoHot has a straightforward method of unlocking 1.1.2 OTB and 1.1.3 OTB iPhones. OTB is out of the box. I’m posting a YouTube video of someone else’s OTB iPhone unlock. Reminder: this is not GeoHot, it’s just an example of what to expect from an OTB unlock.

I’m only posting an excerpt from his blog, but afterward you can click the link to go directly to his 1.1.3 OTB iPhone unlock instruction page. Also, please consider donating to GeoHot via PayPal at geohot@gmail.com.

“These instructions assume that you have already jailbroken the particular firmware you would like to be on. This works from 1.1.2 or 1.1.3 firmware! You can find instructions on how to do that here:

Jailbreak 1.1.2: Windows, Mac
Jailbreak 1.1.3: Installer, Windows, Mac
Downgrade 1.1.3: Windows, Mac

Also, you can only follow these instructions if you are on a 4.6 BL iPhone. This means that your iPhone came with 1.1.2 or 1.1.3 Out of the Box. PLEASE MAKE SURE YOU DON’T DO THIS ON A 3.9 BL IPHONE!

IMPORTANT*: You must have enough disk space free on your iPhone to install this package. Otherwise Installer may display a beach ball and then crash to the Springboard. You need space free on your ROOT file system. Your root file system is about 267M-300M in size. Its NOT the 7.3G file system! A tutorial on how to do this can be found here

Finally, you need BSD Subsystem Installed from Installer app (System Category). This most likely will already be installed especially if you did the 1.1.3 soft update…

If you have 1.1.3 OTB follow the downgrade link above to downgrade and jailbreak your iPhone.”

Link