You Can't Jailbreak iOS 8.4.1
You cannot jailbreak iOS 8.4.1.
The iOS 8.4.1 update plugged up the exploits used by the iOS 8.4 jailbreak and given the close proximity of the iOS 9 release, there's a good chance that the next jailbreak will be for iOS 9 and not iOS 8.
Developers are reportedly working on an iOS 9 jailbreak but there's no guarantee that it will be out when the update arrives in the fall.
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