IPhone SIM activation hack works (but not in US)

The intrpid Jesus Diaz of Gizmodo has been trying the iPhone SIM card unlocking hack that we covered here, and has found that it works, but only sometimes. He was able to use it to enable one SIM to work with a non-AT&T network, but not others. Part of the problem is that the technique only works with the older Version 1 SIMs; many networks have now switched over to the Version 2 and Version 3 SIMs, which use a more complex encryption method to stop this sort of thing. Needless to say, the hackers behind the first hack are continuing their explorations to find ways around this. This hack is unlikely to work in the US: all of the carriers switched over to the more secure Version 2 and 3 SIMs several years ago.