iPhone Dev Team Issues Update on Cydia Behavior

Entitled “Blob banter,” the latest Dev Team post reveals that owners of a jailbroken iPhone 3G or second generation iPod touch will witness Cydia saving their SHSH blobs as a consequence of iOS 4.0 featuring a “soft” SHSH blob check. In recent announcements, the Team also confirmed that its updated ultrasn0w unlock tool is on track for a public release.

“Those of you with jailbroken iPhone3G and ipt2G devices may now have noticed Cydia starting to save your SHSH blobs too, just like it does for iPhone3GS, ipt3G and later devices,” reads the Team’s latest update. “That’s because starting with 4.0, Apple started putting a “soft” SHSH blob check in the firmware. The SHSH blob check is very real in the sense that if iTunes can’t get your blobs (because the Apple signing window has closed), the iTunes restore will error out. But it’s “soft” in the sense that those devices can always use redsn0w or PwnageTool to get past the error (the bootroms themselves for those devices don’t require blobs to be in the firmware files, unlike the newer bootroms).”