updated 06:40 pm EDT, Sun August 1, 2010
JailbreakMe cracks iPhone 4 over the web
The unofficial iPhone Dev-Team today sent word that it had published its first widely available jailbreak tool for the iPhone 4. JailbreakMe uses an exploit in Safari to derestrict the phone over the web. Like earlier jailbreaks, it voids the phone's warranty as long as it's installed but also allows running unsigned apps and others features that Apple chooses not to allow in normal use.
While it can jailbreak the iPad and older iPhones, JailbreakMe doesn't work with the iPad's 3.2.1 firmware. Some iPhone owners have also reported that MMS breaks with the release. Current demand has overwhelmed the servers, they add. The Dev-Team notes that it's still possible to revert to a regular build of iOS by connecting to iTunes and choosing to restore the firmware.
The launch comes just as the Library of Congress has legally sanctioned jailbreaking for the purposes of installing software that a phone vendor wouldn't normally permit. Apple has never filed lawsuits to stop jailbreaking, but the new exemption greenlights at least the use of JailbreakMe and similar tools, if not necessarily their distribution. The company has instead warned of the support consequences that result from running a non-official OS state.