# iOS ## JailBreak and UnJailbreak- the easy way(Semi-Tethered) This is semi-tethered jailbreak which means if you restart your device you have to the same process again to jailbreak. You can again un-jailbreak to restore your device warranty and you can resell your device without hesitation 1. Download latest **Checkn1x** ISO image from the following link 2. Download and install **etcher** or any Bootable USB flasher 3. flash Checkn1x ISO on USB flash drive 4. Go to BIOS settings and disable secure boot and boot with USB 5. Press ALT+F2 to load checkra1n 6. connect your iPhone DFU(Device Firmware Update) mode as guided 7. Device jailbroken message will display if successfully jailbroken 8. To **UnJailBreak** go to Checkra1n App in iPhone and select "Restore System". --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://likhith-cv.gitbook.io/wicked-security/pentesting/mobile-security/ios.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.