The Pangu Untether package with version 0.3 actually rolled out on November 1st for 32-bit devices to fix overheating and over usage of CPU. Just after its release, the bundle was found causing booting issues on some 64-bit devices and further removed immediately from Cydia. Now that, the Pangu Untether 0.3 has been re-released on Cydia after opting.
With fix for both 32-bit and 64-bit devices, now, the Pangu Untether 0.3 released again. Full official change-log is as follows:
Version 0.3 of this package fixes the issue where, on 32-bit devices (iPod 5, iPhone 4S/5, iPad 2/3/4, iPad Mini 1) a specific background process (launchd) would sometimes “spin”, burning CPU and battery, or even heating up.
Before you install, it is important to note that:
before installing updates to this package (which will require a reboot), if, after the first time you ran Cydia on this device, you used the iTunes “restore from backup” feature (or otherwise used iTunes or iCloud to put old data back on your device), please now reinstall Cydia Installer (by going to that package and tapping Modify, Reinstall, and Confirm) to make sure your device can safely reboot with a passcode enabled.
Point is that, if you have already jailbroken iOS 8.0 – 8.1 untethered, you won;t be need to jailbreak. To update to the latest untether, launch Cydia on your iPhone, iPad or iPod touch and head over to Changes tab and hit ‘Refresh’ in the top right corner for Cydia to fetch the latest updates.
Once you see the update on ‘Pangu 8.0-8.1.x Untether’ package being available, simply update it to get to the latest version installed. After a reboot/respring, you should now be running the latest version of Pangu Untether.
For tutorials on how to jailbreak and install Cydia: