Here is a guide taken off BigBoss’s website. All credit goes to him for the guide.
The iPhone dev team’s 3g unlock, yellowsnow is out. There are some changes in how it works. The 3g unlock will require you to be on baseband 2.28.00 which comes with iPhone OS v2.2. This means that those of you that pwned your iPhone to 2.2 without a full restore will now need to restore to 2.2 directly in iTunes so that your baseband gets updated to 2.28. You can check your baseband version in settings, general, about menu. Look for modem firmware. This is beta. If you have a working SIM adapter solution, I recommend that you do not update your baseband and try this. Here is a brief set of steps for those that need a 3g unlock: Read the rest of this entry »