iPhone making calls on Australia's Telstra...

Representing one of the most significant milestones in the race to completely unlock the iPhone, a user has been able to successfully register the device with and make calls on Australia's Telstra network. He's posted a YouTube video demonstration of the semi-unlocked phone in action. The hack was accomplished by modifying the iPhone's default SIM card to be recognized as an AT&T SIM, while actually containing data that allows it to be accepted by Telstra. There are still some significant limitations, however. While the hacked phone can make calls on the Telstra network, it cannot receive them. Also, SMS text messages cannot be sent or received. In the video, ozbimmer demonstrates placing a custom SIM card (that contains data from both the AT&T and Telstra SIM cards) in the iPhone and making a phone call to his voicemail account.