I updated to 2.2.1 a long time ago, before I thought I would sell my iPhone. But I sold it to someone on Ebay who asked me to unlock it for them after buying it. Is there ANY way to unlock this either with some kind of device or software? She claims that some people know how to unlock it for T-Mobile, but I have a feeling that they are not using Yellowsn0w to unlock it. Info: Baseband 2.30.03 Bootloader: 6.2 SW: 2.2.1 iPhone 3G Also, is this 3.0 unlock reliable? Because I could just wait until wednesday, unlock it, then send it out.