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 build 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 input that allows it to be accepted by Telstra. There are still some significant limitations, however. While the hacked phone can manufacture calls on the Telstra network, it cannot receive them. additionally, SMS text messages cannot be sent or received. In the video(It’s unavailable now), ozbimmer demonstrates placing a custom SIM card (that contains details from both the AT&T and Telstra SIM cards) in the iPhone and making a phone shout to his voicemail explanation.

(iPhone was hacked to be able to compose calls on the Telstra network)

The hack is made possible through the use of iActivator, a Mac OS X program that provides an interface for activating/deactivating your iPhone without invoking an AT&T contract or prepaid plan. The program doesn’t unlock the iPhone’s SIM, but simply unlocks the functionality of the iPhone so that an AT&T-based activation is not essential. The tool plus has the option to perform a “Jailbreak” on the iPhone, which allows files to be written to the device’s filesystem.

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