The correct answer is D. Semi-Untethered Jailbreaking.
The key details are:
The device boots normally after restart.
Basic phone functions continue to work.
The jailbreak modifications do not become active automatically after reboot.
The user must manually run a jailbreak application on the device.
No external computer is required.
This behavior is best classified as semi-untethered jailbreaking. In a semi-untethered jailbreak, the device can reboot and operate normally, but the jailbreak state must be re-enabled by running an installed jailbreak application on the device itself.
CEH-aligned mobile hacking material explains that in tethered jailbreaking, rebooting removes jailbreak patches and a computer is required to boot or re-jailbreak the device. It also explains that in untethered jailbreaking, the device remains jailbroken after reboot without needing a computer. Semi-tethered jailbreaking is described as a middle state where the device can complete startup and normal functions, but modifications require the jailbreak tool to restore the patched state . The “no external computer required; run the installed jailbreak app” condition makes the best modern classification semi-untethered.
Option A. Untethered Jailbreaking is incorrect because the jailbreak does not remain active automatically after reboot.
Option B. Tethered Jailbreaking is incorrect because no external computer is required and the phone does not become stuck during startup.
Option C. Semi-Tethered Jailbreaking is close, but semi-tethered commonly implies that a computer or external tool may be needed to restore the jailbroken state. The question specifically says the installed jailbreak app on the device is manually executed without a computer.
Option D. Semi-Untethered Jailbreaking is correct because the device boots normally, but the jailbreak must be reactivated locally through an installed app.
Therefore, the best answer is D. Semi-Untethered Jailbreaking.
