Semi-untethered jailbreaks have become indispensable, as evidenced by the Electra method of iOS 11, Chimera for iOS 12, and even the new boot-based Checkra1n tool for iOS 13. Semi-untethered jailbreaking is still fairly straightforward Once you get used to the steps.
The biggest handicap of a semi-untethered jailbreak is the need to manually start it when your phone shuts down or restarts. Fortunately, when the computer is turned off and on again, only the jailbreak and associated mods are disabled and not immediately removed. Since the jailbreak only sleeps in the operating system of your iPhone, you just have to re-enable it to get all optimizations working again.
Checkra1n prompts you to start your iPhone in DFU mode. Before you do this, the tool automatically restarts your iPhone. So wait a second or two for your device to enter recovery mode.
Step 2: Enter DFU Mode & Re -Enable Jailbreak
After starting recovery mode, Checkra1n displays on-screen instructions that you can use when invoking the recovery mode Support DFU mode. However, you can enter DFU yourself if you know what to do. Checkra1n automatically detects your device as soon as it switches to DFU mode and automatically re-enables your jailbreak.