Pangu provides an iOS 9.0 untethered jailbreak. TaiG provides an iOS 8.4 and 8.3 untethered jailbreak. Check @PanguTeam, @taig_jailbreak, @saurik, and /r/jailbreak for news and updates. You can use Cydia Impactor if you need to un-jailbreak an 8.1-8.4 device without restoring. Instructions for jailbreaking iOS 8.0-8.4. Before asking a question, check Frequently Asked Questions to find quick answer