OverSky iOS 9.3.4  Jailbreak

Min Zheng announced iOS 9.3.4 Jailbreak method. He published a youtube video demonstration of iOS 9.3.4 OverSky (aka Flying) Cydia Installation process using an iPhone 6. It shows an app called ‘OverSky’ being launched that performs actions like “Exploiting kernel” ? “Patching Kernel” ?  “Installing Cydia.” Watch the following Video.
system root install Cydia iOS 9.3.2

Flying JB’s guide

Download the needed files via https://github.com/zhengmin1989/iOS_ICE_AND_FIRE link. it has read me file inside of the zip. Need to follow it for the jailbreak perfection.

Flying JB tool for latest iOS versions

Lot of Jailbreak lovers aware of every new release related jailbreak just like this tool. Most of them say that this tool is fake. Few of them trust this. Actually it has some doubt to trust,  when comparing all the information about Flying JB tool. These info got from the jailbreak users to prove it. So, following screenshots witnesses for that.
Users are well known about this jailbreak much.
this jailbreak
Excited comment from excited user.
Excited comment from excited user
It has given excellent explain from Flying JB tool’s lover for another user, who claim this tool is fake.
claim this tool
Some negative thinking about this tool.
negative thinking
One of the users have given positive comments about the tool.
positive comment
One user reveals one of the fake Flying JB twitter accounts.  Actually it is not an official account. Min Zheng also informs it via his twitter account.  see the following picture to know Min Zheng’s announcement.
Flying JB twitter accounts
Flying JB twitter accounts
Flying JB app
When comparing Flying JB with TaiG jailbreak, PP Jailbreak and also Pangu jailbreak, it is not sure about JB tool release of this in the future. At least jailbreak possibility proven also is in zero marks, when comparing with the iH8sn0w jailbreak, i0n1c jailbreak
Min Zheng has announced Flying JB (OverSky / aka Flying jailbreak) for iOS 9.3.4 as well as iOS 9.2.1 versions. However, these were not released to the public and consider as private jailbreak tools.

Min Zheng / Min (Spark) Zheng is famous as Android & iOS Senior Security Engineer at Alibaba. Also he was credited for the vulnerabilities in iOS versions prior to iOS 9 by Symantec on 16th September 2015.
If the flying JB tool needs to go to the future, it wants to expand. Working only with 32 bit devices is not enough, when discussing about the latest iOS versions.  Flying JB tool needs to work with 64 bit devices too. All the latest iDevices are 64-bit devices.Already there are several jailbreak tools available for iOS 11 & higher versions.

Flying JB (OverSky Jailbreak)

And other side, even if he has entered into the system root of the device by jailbreaking, it has no publish any note, it is possible to install Cydia automatically or at least by manually.
Min Zheng’s video has ended, when it enters the system root using Flying JB tool. So, it has little doubt about the success of it. As the new JB tool developer he must prove the possibility of installing Cydia using same video. Watch the following video carefully. However, he has mentioned Apple has fixed this vulnerability in iOS 9.3.2.
What so ever, it needs the complete jailbreak using the tool. When checking his above video it can identify that after run the Flying JB tool, it installs terminal app only. Then the terminal app should run to complete the jailbreak manually. Without having codes and apps knowledge, it can not complete the jailbreak for Cydia.
Complete the jailbreak as well as installing Cydia with flying JB tool is little bit hard than other JB tools, when watching the video. There is no any news how to install Cydia after complete the jailbreak too. So, all of these issues should manage, if this tool works with latest iOS versions.

Reliability of OverSky Jailbreak tool among the jailbreak lovers

Keen Lab
Phoenix Jailbreak
Phoenix jailbreak is the recently released jailbreak tools for iOS 9.3.5 running 32-bit devices. This is a semi-untethered jailbreak, and both online, and pc required jailbreak method available with this tool.
Saigon Jailbreak
Saigon jailbreak tool released to jailbreak iOS 10.2.1 version. Saigon is developed by Abraham Masri (iabem97/cheesecakeufo), and It is a semi-untethered jailbreak method.Saigon does not use new exploits and only chains together triple_fetch exploit+ziVA exploit+extra_recipe exploits to jailbreak your device.
Jailbreak App Installers
Jailbreak app installation methods available for latest iOS versions. Dev Code extraction method is one of the best jailbreak app installation methods for iOS 12 to iOS 12.1.4 versions. UDID registration method also install Jailbreak apps up to iOS  iOS 11.4.1 version. So far these methods are the best jailbreak app installation methods for latest iOS versions.

Flying JB iOS 9.2.1 Jailbreak

Min Zheng has demonstrated jailbreak method for iOS 9.2.1 via youtube video. Flying JB is based on inpuTbag (after the popular Prison Break character Tbag), a 15-year-old kernel HeapOverFlow vulnerability.
The demo shows ‘Flying JB’ app is successfully jailbreaking iPhone 5c running iOS 9.2.1. Flying JB tool is a little bit different than other jailbreak tools. Cause, when running the JB tool, it installs the terminal app into the home screen. It means it is not 100% complete jailbreak. Therefore we have to run the terminal app manually if we need to complete the full jailbreak.

iOS 11.3 Jailbreak

A couple of days ago he discovered new kernel vulnerability survive in iOS 11.3 versions.  It exists in iOS 11.2.6 and Older versions too. Zheng tweeted it via his official Twitter page. Still, Zheng has not confirmed further details about the exploits. Apparently, this would be useful to develop an iOS 11.3 jailbreak tool.
Zheng tweeted new kernel vulnerability
Min Zheng again surprised jailbreak community by achieving root shell access on iOS 11.3. It is an essential part of iOS 11.3 Jailbreak. He informed this via his official twitter ac. Check below screenshot.
Twitter iOS 11.3 jailbreak
Min Zheng’s all Jailbreak approaches as follows.
Min Zheng continuously worked on iOS 11.3 Jailbreak. This time Zheng has confirmed that he has successfully jailbreak iOS 11.3 with his latest tweet.
He always shared the progress of work through Twitter and before this he tweeted as he wasn’t able to remount rootfs and get R/W privileges to install Cydia.
Even if it is real iOS 11.3 jailbreak, most likely private Jailbreak same as his previous Jailbreak tools. 
OverSky Jailbreak iOS 11.3.1
Twitter iOS 11.3 jailbreak

iOS 11.3.1 Jailbreak

Again Min Zheng comes with iOS 11.3.1 Jailbreak. Spark (@SparkZheng) and Bxl (@bxl1989) published iOS 11.3.1 Jailbreak demonstration video on youtube as well as the twitter page. However, there is no any hint about public release if this iOS 11.3.1 Jailbreak. Sometimes they won’t release it to the public as earlier OverSky Jailbreaks.
Jailbreak apps for iOS 11.2 to iOS 11.4
Phoenix Jailbreak

iOS 11.4 / iOS 11.4.1 Jailbreak

Min Zheng attend for iOS 11.4 Jailbreak. He achieved Sandbox Escape bug on iOS 11.4. This vulnerability is a very important part of Jailbreak.
Min (Spark) Zheng & Xiaolong Bai speak about “ Fasten your seatbelts: We are escaping iOS 11 sandbox”  26th Def-Con Hacking Conference held on 9th-12th August 2018 at the Caesars Palace in Las Vegas, Nevada USA.
Also, deliver a speech about “One bite and all your dreams will come true: Analyzing and Attacking Apple Kernel Drivers.”
However, he did not mention about for iOS 11.4.1 jailbreak.

iOS 12.4 to iOS 12 Jailbreak

Zheng continuously supports for jailbreak every iOS version. Apples released iOS 12.1.4, iOS 12.1.3 by patching many of vulnerability exist on iOS 12.1.2 and lower version. Therefore iOS 12.1.3 & higher jailbreak will be much harder than lowest iOS versions jailbreak. No any hint about iOS 12.1.3, iOS 12.1.4, iOS 12.2, iOS 12.3 - iOS 12.3.2, iOS 12.4 or beta versions of iOS 13 from Zheng. However, now it has Unc0ver Jailbreak by Pwn20wnd & Chimera Jailbreak by Electra team iOS 12 to iOS 12.2 versions.
Zheng has previously tweeted about iOS 12 untethered jailbreak has been achieved on an iPhone X by  Pandora Lab. Also  Zheng & Xiaolong Bai iOS senior security engineers at Alibaba released a video on Weibo Chinese site.
Zheng and the Xiaolong Bai attend for iOS 12.1.2 jailbreak. They achieved root access on iOS 12.1.2 running iPhone XS max. Time to time they are publishing proof about iOS 12.1.2 jailbreak related things.
Here are some of the few tweets screenshot extracted from his official twitter ac.
 Min Zheng iOS 12.1.2 root access on iphone XS
image alt text - Min(Spark) Zheng iOS 12.1.2 root access
Min Zheng announced via tweeted about iOS 12 jailbreak achieved on iPhone XS by Pangu team.
KeenLab proved iOS Jailbreak possibility for many iOS versions as follows so far.

Jailbreak iOS 12.2 on iPhone XS Max at InfiltrateCon 2019

iOS 12.1 jailbreak on iPhone Xs at PoC 2018

iOS 12 Jailbreak on iPhone Xat RECon conference

iOS 11.3.1 Jailbreak using iPhone X at InfiltrateCon 2018

iOS 11.1.1 jailbreak at PoC 2017

Jailbreak iOS 11 beta 2 on iPhone 7, Jailbreak iOS 10.3.2 on iPhone 6 & Jailbreak iOS 10.3.2 on iPhone 7 on MOSEC 2017

However they did not release public tool yet & it has many jailbreak tools for these versions now.