Figure 4- 8 Safe mode
In safe mode, all third-party tweaks that base on CydiaSubstrate will be disabled for
troubleshooting. But safe mode can’t guarantee absolute safety, in many cases, devices fail to
boot because of problematic third-party dylibs. In this situation, you can perform a hard reboot
by pressing and holding the home and lock buttons, then completely disable CydiaSubstrate by
holding the volume “+” button. After iOS successfully reboots, you can start error checking.
When the problems are fixed, reboot iOS again to enable CydiaSubstrate.