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Locating the ProblemĪttempt designating where the issue is originating from.

Instead of sending your device into a crash cycle, this feature will disable the substrate, which includes all the extensions, themes, and tweaks, granting you the opportunity to uninstall any packages that may have caused the crash. The best way to think of Safe Mode is as a window of opportunity. This substrate functions as a support framework for third-party developers which allows the implementation of their tweaks and/or extensions on your device.īy defention, "The Cydia Substrate provides a simple platform (one integrated with Cydia) for deploying code that gets inserted into graphical applications." So when things crash, the substrate is able to handle errors and provide fallback support, known as Safe Mode. With Cydia comes a preinstalled package known as the Cydia Substrate. When you jailbreak your device, you also install Cydia, a sort of app store for tweaks and themes. Please enable JavaScript to watch this video.