iOS 8.3 No Longer Being Signed

Following the release of iOS 8.4 as well as iOS 9 Beta 2 late last month, Apple has apparently stopped signing iOS 8.3, which means that users are no longer have the ability to downgrade or restore their iOS devices from the latest iOS 8.4 to iOS 8.3.

Fortunately, with the release of iOS 8.4, the TaiG Team was able to launch an the Untethered Jailbreak for iOS 8.4, therefore it is recommended to quickly upgrade and update to the company's latest iOS 8 release, if you want to take advantage of the 
Jailbreak and keep it alive, before Apple releases a new patched iOS version and blocks the exploits used to jailbreak your iDevices.

Keep in mind that the TaiG Jailbreak is only compatible with Windows for now, while a Mac version is expected to be released later on. Although Mac users can still benefit from this Jailbreak using a Virtual Machine.