Despite the ton of improvements to iOS 11 released in September 2017, people still want to see jailbroken version of iOS 11. In fact, various features were included in this update, such as the unified Lock Screen and Notification Center, customizable Control Panel, and all-new dock for the iPad, among others.
The last known functional jailbreak was for iOS 10.3.3, while only a beta version of iOS 11 was released for the public. Take note that Apple is now focused on patching security vulnerabilities by speeding up the release of new software updates from time to time.
When hackers see a hole in the new release, they try to run after it to create a new jailbroken version. However, given the update speed of each new iOS version, you still can’t see any iOS 11 jailbreak so far. This is due to the fact that Apple may have done a good job of patching such vulnerabilities. So, its development should be so weak to come up with a new jailbroken iOS version.
Apple is still signing iOS 10.3.3, as of the moment. Therefore, if you are thinking of jailbreaking your iOS device to 11, the nearest version that you should settle at is 10.3.3. This is because Apple has made things tougher for hackers for iOS 11 in terms of security measures. Thus, your best bet should be to keep it low this time at iOS 10.3.3 only.
On the other hand, you may stick to iOS 11 for now, and try not to upgrade to 11.0.x or later. The moment a new update arrives, the software gets a lot tougher to crack, so hackers are looking forward to get any luck at a specific jailbreak point below the iOS 11 mark. The best option for you to take is to keep it as low as possible, but not beyond the last known jailbreak version of iOS 10.3.3.