Pangu 7.1-7.1.x Untether cydia tweak brings untethered jailbreak based on pangu exploits.
Version 0.3 adds small improvements to this untether (details for developers: fixes some sandbox issues and allows task_for_pid(0)).
Your device will need to reboot for these changes to take effect.
If your device needs this upgrade (users with version 0.1 or 0.2), Cydia will prompt you to upgrade this package. (Note: upgrading this package does not change whether afc2 is enabled on your device.)
If you see a green flash while rebooting, that is OK.