The iPhone 3G unlock is now available. The unlocking software is called yellowsn0w, runs as an invisible application in your iPhone, and it's very easy to install. Here's how. [Updating as we try it]
Yellowsn0w, the Phone 3G unlock, runs as a small command line application that gets installed in any jailbroken iPhone 3G using Installer. It's very easy to install:
• First, update your iPhone 3G to the latest iPhone OS provided by Apple using the latest iTunes.
• Use Installer or Cydia to install yellowsn0w, which is completely free. Here are the addresses you have to use to add yellowsn0w to your installer application:
For Cydia enter: http://apt9.yellowsn0w.com/
For Installer enter: http://i.yellowsn0w.com/
• That's it. There are some special SIM cards that give problems, but f you have a normal SIM card from any non-official carrier, you are fine.
BEWARE: This is a beta application—version 0.9.1-- so install at your own risk—I'm installing, it, though. Since it's a daemon which doesn't alter anything permanently, it seems safe. Just proceed with caution and be warned. [IPhone Dev Team]