If you know what Ultrasn0w is, then you maybe just did a little happy dance. If you don't: it unlocks your iPhone to work on other carriers. If you don't care for AT&T, for example, you can use Ultrasn0w on T-Mobile. One tip: you'll have to disable 3G for T-Mobilers in the US of A. Lucky us, eh? Ultrasn0w doesn't magically add CDMA powers to your iPhone, so give up your dreams, Sprint, Verizon and just-about-everyone-else-customers.
Ultrasn0w for 3G, OS 3.0 is out -- 3GS not yet
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