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.
Apple releases iPhone OS 4 beta 4, adds U.S. tethering

Charles Starrett
Charles Starrett was a senior editor at iLounge. He's been covering the iPod, iPhone, and iPad since their inception. He has written numerous articles and reviews, and his work has been featured in multiple publications.