If you’ve already jailbroken your iPhone 4 (and it’s so simple these days…), you’ll be pleased to know that the next step toward freedom — the carrier unlock — is now ready and waiting for you in the magical lands of Cydia.
The latest version of Ultrasn0w (1.0-1) will unlock iPhone 4s with baseband 01.59 and iPhone 3G/3GSs with basebands 04.26.08, 05.11.07, 05.12.01 and 05.13.04.
Eager to get it, but can’t see it in Cydia? Try adding the repo666.ultrasn0w.com repository. Voilà!
Of course, don’t do this if you’re uncomfortable with the thought of having no warranty on your shiny new toy, and don’t blame me if anything goes wrong.
Engadget have found a handy step-by-step video, so I thought I’d put it here, too: