Apple has released the fourth beta version of iPhone OS 4 for the iPhone and iPod touch, along with the accompanying SDK. As with prior beta releases, a main Xcode and SDK beta is available for download, as are pre-release builds of the iPhone OS 4 software for the iPhone 3G and 3GS, and the second- and third-generation iPod touch.
Mac Rumors notes that the new beta version includes a new configuration page for Internet Tethering, and a special alert for AT&T customers telling them to call AT&T at 611 or visit AT&T’s website to enable tethering on their account, suggesting AT&T may be planning to offer the long-awaited feature with the arrival of iPhone OS 4. Both the new SDK and pre-release builds are available now for download by registered iPhone developers from the iPhone Dev Center.
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