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iOS 11.3.1 Jailbreak

1. Developer code extraction method
This is the most popular iOS 11.3.1  jailbreak app installation method.
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4. UDID Registration method

Apple developers can install any apps using UDID registration method. So Velonzy makes you as virtual Apple developer and lets you allow to install any app using UDID registration.
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1. Developer code extraction method

Russian hacker ru$za has found developer code extraction method for the first time. Chinese hacking team upgraded this method as Anzhuang App.

Currently, Anzhuang is only Dev code extraction method based Jailbreak app installer for iOS 11.3.1.
At this time Anzhuang is available on zJailbreak, Xabsi or iExtras app stores.
Anzhuang Compatibility
Anzhuang compatible with all iOS 11.3.1 running Apple devices. We ran the Anzhuang on the following iPhone/iPad models, and it worked perfectly.

iPhone X, iPhone 8/8 Plus, iPhone 7 Plus, iPhone 6 , iPhone SE , iPad Pro , iPad Mini 4, iPad Air 2.

How to Install Anzhuang for free

How to upgrade Xabsi free?
Install the Xabsi free version using Xabsi installation button (Above of this page) or their official website of Xabsi.

Then copy the following link on your device safari browser to upgrade it to full version.

4. UDID registration method

UDID registration is another way to install iOS 11.3.1 Jailbreak apps. Velonzy is the most popular UDID registration method.
Velonzy is an iOS developer. Apple will allow to install 3rd party/ Apple non-approved apps to the iOS developers.
Velonzy will let you become a virtual Apple iOS developer by registering your UDID code under the Velonzy database. As a result of that, you can install the 3rd party apps /Jailbreak apps on iOS 11.3.1 devices.
Velonzy based on the donation. You must donate them to use their services. We provide the free methods to install velonzy. We have donated the Velonzy team and updated the free link to this site to get it free for you.
Velonzy has both online and computer installation methods. However, it is offered different kind jailbreak tweak collections according to installation method. We advised you to install both methods to get the maximum number of apps.
Device Compatibility
iPhone X, iPhone 8 Plus, iPhone 8, iPhone 7 Plus, iPhone 7, iPhone 6S Plus, iPhone 6S, iPhone 6 Plus, iPhone 6, iPhone SE, iPhone 5S.

iPad Pro (10.5-inch), iPad Pro (12.9-inch), iPad (9.7-inch), iPad Mini 4, iPad Air 2, iPad Mini 3, iPad Pro (9.7-inch), iPad Pro (12.9-inch)

iPod Touch 6
Velonzy Online guide
Step 01 - Get free Velonzy Access from here and Tap the Register UDID" button.
Step 02 - Now it will redirect to the Velonzy UDID submitter installation menu.  Provide the device passcode submit your UDID to the Velonzy database.
Step 03 - Then install Velonzy Jailbreak app installer to your iOS 11.3.1 iPhone, iPad or iPod.
Velonzy Computer Guide
Step 01 - Click the following button to submit your UDID to the Velonzy database. (You can get your device UDID through iTunes. Connect your device to the computer, Launch the iTunes and copy paste your UDID code)
submit your UDID to the Velonzy database
Step 02 - Click on following installation buttons according to your computer OS version.
Download the Velonzy Jailbreak app Windows
Download the Velonzy Jailbreak app mac
Step 03 - Go to Velonzy Jailbreak IPA list and provide your UDID to download Jailbreak IPA to your computer.
Step 04 - Now drag and drop the Jailbreak IPA on Velonzy Jailbreak app installer.
Step 05 - Enter Apple ID and password to sideload the Jailbreak IPA.
Step 06 - when the process completed, you must trust the developer profile.
Apricot supported device list
Go to Settings --> General --> Device and Profile management.

5. Virtual Jailbreak

Apricot is the world first web-based mirror OS version of Apple. 
You can install Apricot on your iOS 11.3.1 iPhone to experience it.
Apricot will let you virtually jailbreak your iOS 11.3.1 iPhone and it will install web-based  Cydia app to your device.
iPhone X, iPhone 8 & 8 Plus, iPhone 7 & 7 Plus, iPhone 6S & 6S Plus, iPhone 6 & 6 Plus, iPhone SE, iPhone 5S.
Install Apricot
Apricot does not provide free service. You must have to purchase the Apricot from their website. However we will provide the free installation method through this page.
Apricot iOS for Xabsi
Apricot iOS for zjailbreak
Install Apricot for Free
Step 01 - Open the Apricot free link from your mobile Safari browser.
Step 02 - Select the installation method according to your device model.
Step 03 - Click on install Apricot iOS button.
Step 04 - Provide the device passcode to install it on your iOS 11.3.1 iPhone.
Jailbreak Apricot iOS 11.3.1
You can get virtually jailbreak the iOS 11.3.1 version and install Cydia application on Apricot iOS.
Step 01 - Launch the Apricot from your iOS 11.3.1 device.
ailbreak Apricot OS
Step 03 - Click on the “Jailbreak Apricot OS --> "Jailbreak Now.”
Jailbreak Now
Step 04 - After few seconds you will get the Cydia configuration Black Screen.
Step 05 - Finally, Cydia icon will be available on your Apricot iOS.
Apricot app
Step 02 - Click on the unlock button.
5. Virtual Jailbreak for 3rd party web OS 
Web-based iOS jailbreak updated to iOS 11.3.1 version. You can virtually Jailbreak iOS 11.3.1 running iPhone. 
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Velonzy UDID submitter installation menu
Apple Beta Software Program
Apple releases beta software to the registered Apple developers for testing purpose. Through the beta releases Apple will track the performance of beta software, and they want to ensure there are no any bugs before the public release. As well they can get an idea where they have to develop further. Now Apple has released iOS 12 beta to the developer as upcoming version. As well Apple has improved the security features to prevent the jailbreak iOS 12.

Root shell access on iOS 11.3
Min Zheng is a security researcher for Alibaba, achieved the root shell access on iOS 11.3. He always hit the jailbreak community with a new update. Before this, he discovered the two vulnerabilities on iOS 11.3 as well as older version. However, there is no confirmation about Jailbreak release. But we can predict it is too close to much-awaited iOS 11.3 jailbreak.

Silzee Online JB
Mostly semi-untethered or untethered jailbreak process required a windows/Mac computer. Silzee Online JB app lets you install all semi-untethered or untethered jailbreak tool without a computer. It is a straightforward process. You need to install Silzee Online JB app on your iPhone, iPad or iPod is the solution. Silzee app is exclusive on zJailbreak, Xabsi or iExtras third-party app stores. Currently, Silzee offers online Jailbreak for Electra, Goblin, Saigon, Yalu 102, H3lix, Phoenix, Homedepot, Pangu JB and Etason JB.

iOS 11.2.6 Jailbreak
There are several solutions available for iOS 11.2.6 jailbreak.  UDID registration method and Dev code extraction methods are the most popular iOS 11.2.6 Jailbreak apps installation methods. Also, Yalong Chinese tool available as semi untethered Jailbreak. Go to iOS 11.2.6 Jailbreak page for more details.
Some of the above methods work perfectly for iOS 11.4 Jailbreak & iOS 11.4.1 Jailbreak too.
You must have installed 3rd party app store like zJailbreak, Xabsi or iExtras before install Anzhuang. All of these app stores are donateware.
We recommend to following guides to get Anzhuang for free to your iOS 11.3.1 iPhone or iPad.
Using zJailbreak
Watch the following video to install zJailbreak Freemium version on your iOS 11.3.1 running iPhone/iPad.
We provide zJailbreak donation coupon codes for free on this page. You can use these codes to upgrade zJailbreak to the Freemium version and install Anzhuang using the zJailbreak app store.
But we highly recommend you to donate some amount of money if you wish to appreciate the developer's hard work.
As the above, we have provided Xabsi freemium installation links to register it for free and download Anzhuang from the Xabsi.

iOS 11.3.1 Jailbreak Approaches

iOS 11.3.1 is stable than the iOS 11.3. Apple has patched few numbers of vulnerabilities through the iOS 11.3.1, which was found on iOS 11.3 version.
Here are the details of iOS 11.3.1 bug fixing. Apple has credited them in “security content of iOS 11.3.1.”
Memory corruption issue  by Ian Beer of Google Project Zero (CVE-2018-4206)
Spoofing issue existed in the handling of URLs by Zhiyang Zeng &Roman Mueller (CVE-2018-4187)
Memory corruption issue by Ivan Fratric of Google Project Zero (CVE-2018-4200)
Memory corruption issue by Richard Zhu (CVE-2018-4204)
Whatsoever iOS 11.3.1 already jailbroken. Check out below iOS 11.3.1 Jailbreak News.
3. Houdini Semi Jailbreak
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Houdini Semi Jailbreak just updated for iOS 11.3.1 to customize the iOS devices.

3. Houdini Semi Jailbreak

Abraham Masri updated Houdini semi jailbreak tool for iOS 11.3.1.
Houdini Device Compatibility
iPhone X, iPhone 8 & 8 Plus, Phone 7 & 7 Plus, iPhone 6S & 6S Plus, iPhone 6 & 6 Plus,iPhone SE,  iPhone 5s.

iPad Mini 2, iPad Mini 3, iPad Mini 4, iPad Air, iPad Air 2, iPad Pro
iPod Touch 6G
Step 01 - Download Houdini Semi Jailbreak IPA from the following button.
Step 02 - Download the Cydia Impactor from Official site.
Step 03 - Launch Cydia Impactor and drag and drop the Houdini IPA to the Cydia impactor.
Step 04 -  Enter your Apple ID and passcode to sideload the Houdini IPA.
Step 05 - Once complete the installation process, Houdini app available on your device homescreen.
He released Houdini beta 3 with the support of iOS 11.3.1 to iOS 11.2 including new features such as Added Passcode customization, Home and lock screen widgets, Customize iOS 11 Control Center, etc.
It has updated using Ian beer iOS 11.3.1 exploit and previously he upgraded Houdini for iOS 11.1.2 to iOS 11 versions. It is initially released for iOS 10 to iOS 10.3.2 versions.
Houdini Installation Guide (PC Required)
Download Houdini Beta 3
Step 06 - Before opening it trust the Houdini app. Go to Settings > General > Profile & Device Management > Trust the app.
Congratulations! Now you have installed the Houdini on your iOS 11.3.1 iPhone / iPad. You can customize your device using Houdini now. However, you cannot install Cydia with Houdini Semi Jailbreak. Houdini Online guide to install jailbreak apps for iOS 11.3.1 will be available soon with zJailbreak or Xabsi app store.
Ian beer who released tfp0 exploit for iOS 11 again working for the iOS 11.3.1 exploit and he informed via his official twitter aC.Jailbreak developers can create iOS 11.3.1 Jailbreak using this exploit. 
tfp0 exploit for iOS 11.3.1 by Ian beer
Qixun Zhao/(@S0rryMybad) a member of the Qihoo 360 Vulcan team, Jailbreak the iOS 11.3.1. He confirmed it via his official twitter page and thanks to Qihoo 360 Vulcan Team and @Morpheus. As well he published a demonstration video to the Chinese site. Zhao shows off Mobile Terminal running on the iOS 11.3.1 device with root access before launching Cydia. However, there is no any hint about public release yet.
iOS 11.3.1 Jailbreak Demo by @S0rryMybad
Watch the following video by @S0rryMybad :
Min(Spark) Zheng and Xiaolong Bai (@bxl1989) has Jailbreak iOS 11.3.1 version. They have published a demonstrated iOS 11.3.1 video on youtube as well as the official Twitter page. Before this Spark has tweeted, he has successfully jailbreak the iOS 11.3 version too. However, even Spark owns OverSky jailbreak, he never releases it to the public. Therefore, most probably this will be a private jailbreak too.
Liang Chen and Marco Grassi (Tencent Keen Security Lab) proved the Semi-Untethered jailbreak possibility of iOS 11.3.1 version. They have successfully jailbroken iOS 11.3.1 using iPhone X at Infiltrate Security Conference 2018.
Also, Liang Chen tweeted one of the screenshots having Cydia on iOS 11.3.1 version through his official twitter account.
Keen iOS 11.3.1 Jailbreak
However, there is no any mention about the public release of Keen IPA to jailbreak iOS 11.3.1 yet. Keen Lab demonstrated iOS 11.1.1, iOS 11 and iOS 10.3.2 previously. They did not released the Keen jailbreak method which was used to jailbreak iOS 11.1.1, iOS 11 and iOS 10.3.2 at that time too.
As promised, Ian beer has released the iOS 11.3.1 exploit in the public domain.
iOS 11.2.6 Jailbreak
Apple Beta Software Program
Root shell access on iOS 11.3

iOS 11.3.1 Jailbreak News

Ian Beer released second iOS 11.3.1 Jailbreak exploit :
Again, Ian Beer released empty_list, a proof-of-concept exploit for getvolattrlist iOS 11.3.1 kernel bug.
Ian Beer released empty_list
iOS 11.3.1 Jailbreak Exploit Released By Google’s Ian Beer :
iOS 11.3.1 Jailbreak Demo by @S0rryMybad :
iOS 11.3.1 Jailbreak by Spark and Bxl :
Keen iOS 11.3.1 Jailbreak :
Pheonhex Dev Team releases Safari exploit for iOS 11.3.1
Niklaus Baumstark has released browser-based Safari exploit for iOS 11.3.1 version.  The Safari browser exploits using the CVE-2018-4233 WebKit bug  based on the Ian Beer’s tfp0 exploit. Niklaus Baumstark is a member of Phoenhex Dev Team. Previously, this team has discovered the bugs in Safari and Participated in the Pwn2Own 2018 too.
However, these bugs have patched on the iOS 11.4 versions.
Pheonhex DevTeam Safari exploit for iOS 11.3.1
iOS 11.3.1  Electra with Cydia demoed
Electra developer Cool star & the team workers shared the  Electra1131 jailbreak progress. This time @nullriver shared numerous screenshots of Cydia running on iOS 11.3.1 version.
@nullriver shared numerous screenshots of Cydia
Besides, other Electra team member,  @Pwn20wnd has confirmed that the new Electra1131  tool will offer a feature that user can revert to a non-jailbroken state with new Electra app.
@Pwn20wnd has confirmed
RootlessJB for iOS 11.3.1
New concept Jailbreak called as RootlessJB released by Jake James. It is not system rooted jailbreak and does not install Cydia. It allows to install Cydia tweaks on iOS 11.3.1 to iOS 11.2 with the support of Filza and ZipApp free.
RootlessJB for iOS 11.3.1
Following Jailbreak methods available for iOS 11.3.1. All of these methods are working with latest iPhone and iPad models.
2. Electra Jailbreak
Electra1131 released to install Cydia for iOS 11.3.1.
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2. Electra Jailbreak

Electra team released Electra1131 for iOS 11.3.1 Jailbreak. It is compatible up to iOS 11.2 Jailbreak. It has the following two methods to install Cydia with Electra.

Electra Computer Method (PC / Mac)

Step 01 - Download the Electra1131 from the following button.
Step 02 - Download the Cydia Impactor tool according to your computer.
Step 03 - Connect iOS 11.3.1 device with the computer. Run the Cydia Impactor. Drag and Drop downloaded Electra1131 IPA into the Cydia impactor.
Step 04 - Provide your Apple ID Email and the password. Then it will sideload Electra1131 IPA to your device.
Step 05 - Electra Jailbreak app will be available on your device homescreen after the sideloading process.
Step 06 - You must trust the Electra app before launch. Go to the Settings -->General and Profile and Device management --> Trust.
Step 07 - Run the Electra app from your device now. Tap the Jailbreak button. Then it will start to complete the jailbreak process.
Step 08 - Once complete the jailbreak process,  your device will reboot. Finally Cydia icon will be available on your device homescreen.
Note - Because of the Electra1131 jailbreak is semi-tethered. you have to re-jailbreak your device after every reboot.

Device compatibility :

iPhone X, iPhone 8, iPhone 8 Plus, iPhone 7, iPhone 7 Plus, iPhone 6s, iPhone 6s Plus, iPhone 6, iPhone 6 Plus, iPhone SE, iPhone 5s.

12.9-inch iPad Pro, 2nd generation 12.9-inch iPad Pro, 1st generation 10.5-inch iPad Pro, 9.7-inch iPad Pro, iPad Air 2, iPad Air, iPad 5th generation, iPad mini 4, iPad mini 3, iPad mini 2.

iPod touch 6G.
electra 11.3.1 app
1) Electra Online Method

Electra Online  Method

Electra online method is available with Silzee online JB app. Silzee not available with Apple app store and It is available on third part stores such as zJailbreak and Xabsi. This is the most straightforward way and it does not require a computer.
Step Guide
Step 01 - Download zJailbreak or Xabsi using above installation buttons to your iOS 11.3.1 device
Step 02 - Now download Silzee Online JB app from the any downloaded store.
Step 04 - Now you have installed Electra app to your iOS 11.3.1 device. Run Electra app from your device.
Step 06 - After few seconds your device will respring, and you can find the Cydia icon on your device homescreen.
Congratulations! Now you have Jailbroken your iOS 11.3.1 device successfully..
Here is the Electra computer guide for iOS 11.3.1 Jailbreak. You must need Mac or windows pc to complete the process.
Step Guide
2) Electra Computer Method
FilzaJailed /FilzaEscaped for iOS 11.3.1
FilzaJailed iOS file manager just updated for iOS 11.3.1 to iOS 11.2 versions. It is no jailbreak method to get the full root access for all the files in the directory. Bas vT / @AppleDry05 is the creator of FilzaEscaped. Download FilzaJailed /FilzaEscaped from here.

Yalong Jailbreak

Yalong is Chinese Semi-Untethered Jailbreak tool.  Yalong is now compatible with iOS 11.3.1 jailbreak to install Cydia. Currently, it has only Windows version, and Mac version will be added soon.  
Yalong Jailbreak Guide
Step 01 - Tap the following button download the Yalong IPA.
Step 02 - Download the Cydia Impactor.
download the Yalong IPA
Step 03 - Now plug your device using a USB cable to the PC.
Step 04 - Open Cydia Impactor and drag and drop Yalong IPA to Cydia Impactor.
Step 05 - After few seconds Yalong app will be appear on your device. Run the Yalong app on your iOS 11.3.1 device.
Step 06 - Tap on the Jailbreak button to start the jailbreak process.
Step 07 - Once done,  Cydia will be available on your device homescreen.
Still, Yalong is compatible with iPhone 5S only. Yalong device compatibility for all devices will be upgraded soon.
Cydia available on your device homescreen
Step 03 - Run the Silzee app from your device and tap Electra 11.3.1 button to install Electra app to your iOS 11.3.1 device.
Step 05 - Tap on Jailbreak button to start the Jailbreak process.