Saturday evening, Apple has officially stopped signing the iOS 8.4
firmware, which is the last jailbreakable firmware before Apple dropped the iOS 8.4.1
update that closes the TaiG jailbreak
. This means that after updating to iOS 8.4.1, there is now no longer a way to downgrade back to iOS 8.4.
Although this could be bad news for some people, those on iOS 8.4 with a jailbreak can still take advantage