The iOS 7 jailbreak was released last Sunday, but it was a messy release that had a lot of bugs and compatibility issues. We warned everyone to wait at the time. Today the last major issue with the jailbreak was fixed for newer iOS devices with the A7 chip.
Jay ‘saurik’ Freeman, the creator of Cydia, has updated Mobile Substrate for iOS 7 and the new 64-bit architecture found in the iPhone 5s, iPad Air, and second-gen iPad mini.
For the less jailbreak savvy, Mobile Substrate is essentially the backbone that allows most Cydia tweaks to work. Without it, tweaks that want to modify iOS on a core level simply can’t function. While jailbreak apps like iFile will work, more low-level extensions like biteSMS will not.
There are two main reasons Mobile Substrate is just now being updated more than a week after the Evad3rs released their iOS 7 jailbreak. The first is that Apple switched from a 32-bit to 64-bit processor in its new iOS hardware, which means that Mobile Substrate needs to be recompiled. The second is that Freeman was not informed beforehand that the jailbreak was being released, so he didn’t have a chance to update things on his end for Cydia to be fully compatible for all devices.
Now it’s up to jailbreak developers to update their tweaks for 64-bit in Cydia. Even though Mobile Substrate now works, make sure to check if a tweak is compatible with your device before installing. You can download the iOS 7 jailbreak from the Evasi0n website.