There is no online Untethered Jailbreak solution for iOS 11.2. Never pay/donate before getting the Jailbreak, or never complete app installation offers to Jailbreak your device or download the Cydia to your device. All of this kind app installation related Jailbreak methods are scams. Always refer the Reddit ( or any other trusted websites) before choosing the Jailbreak software/applications.

iOS 11.2 - 11.2.2 Jailbreak

1) Anzhuang

Anzhuang is the latest Jailbreak method for all the latest iOS versions including iOS 11.2.2.

How to install Anzhuang using zJailbreak

 
Step 1)  Visit zJailbreak site from the Safari browser of your device. (You can use the above link or Google to find the site)

Install Jailbreak apps for iOS 11.2/11.2.1 & 11.2.2 using the Anzhuang

Step 1. Open Anzhuang and browse the following Jailbreak app categories
Games
App managers
Best apps
Other Apps
Entertainment
System tweaks
Customization apps
Themes
OS Simulators
++ Apps
Step 2 - Select a Jailbreak app and Generate a developer code of the app.
Step 3 - Copy the code and paste it on Anzhuang app.
Step 4 - Tap install button to download Jailbreak app to your iOS 11.2/11.2.1/11.2.2 device.
P.S -  You may need to verify developer for some apps. Go to Settings, General and Profile & Device management to trust the user.
It is required to enter your device passcode to install the app for Some apps.

2) Velonzy

Velonzy is the UDID registration based Jailbreak app installation method for iPhone and iPads. Now Velonzy Jailbreak is compatible with iOS 11.2, iOS 11.2.1 as well as iOS 11.2.2.
 
 
The following Jailbreak solutions are available for iOS 11.2, iOS 11.2.1 and iOS 11.2.2. Some of them install the Cydia.
1) Anzhuang - Anzhuang is an Online Jailbreak app installation method up to 11.2.2. It based on dev code extraction method. Anzhuang is compatible with all the iPhones and iPads running iOS 11.2 - 11.2.2. You can install the Cydia from this.
2) Velonzy - Velonzy is the UDID registration based Jailbreak app installation method for iOS 11.2, 11.2.1 & 11.2.2.  You can use the online Jailbreak app installer or Velonzy Windows/Mac tool to install Jailbreak apps from Velonzy.
 
It has several jailbreak methods to jailbreak iOS 11.1.2 version. Houdini Jailbreak, Liber iOS Jailbreak, C0F3 Jailbreak and EpimetheusXI Jailbreak are the latest jailbreak tools. Some of them are still under development and rumors only. However, Pangu Anzhuang and Velonzy allow you to install nonsystem rooted jailbreak apps including Cydia.
No PC jailbreak method
Pangu Anzhuang is the best NO PC jailbreak solution for latest iOS versions. It is a browser based online jailbreak method and It is available to install many jailbreak apps under the anzhuang jailbreak app categories.

iOS 11.1.2 Jailbreak
Phoenix Jailbreak
Phoenix is a semi-untethered jailbreak solution for iOS 9.3.5 jailbreak. It has two ways to complete the jailbreak process. One method is PC free online solution. Other method asks PC support. However, both method install Cydia for all the 32-bit devices after the jailbreak process.

Step 02 - Go to the Velonzy website and register an account, Then you will receive an email.
Step 03 -  Connect your device to the iTunes to get your UDID. watch above video to find more info
Step 04 - You can find a button as the Register UDID on this email. Click it and submit the UDID to the Velonzy database.
Step 05 -  Now you can download Jailbreak apps for your iOS 11.2/11.2.1/11.2.2 iPhone, iPad. Go to Jailbreak IPA page on Velonzy website, Enter your UDID to sign and download the Jailbreak apps which compatible with iOS 11.2/11.2.1/11.2.2.
Step 06 - Open Velonzy Jailbreak app installer. Click the “Open Cydia impactor” link. Then drag and drop Jailbreak IPA files to the Cydia Impactor.
Step 07 - Enter your Apple ID and password. It installs the Jailbreak apps to your iOS 11.2/11.2.1/11.2.2 device.
Step 08 - Still you cannot open the Jailbreak apps. You must trust the developers of the apps.

Go to Settings, General and Profile and device management to trust the developer.
iPhone X Jailbreak
Anzhuang and Velonzy Jailbreak methods are compatible with iOS iOS 11.2.2 running iPhone X devices. Also, keen team demonstrated iPhone X Jailbreak at POC conference, South Korea.

More about iPhone X Jailbreak

Jailbreak Scams

Cydia for iOS 11.2.2
Anzhuang Jailbreak app installer allows users to install Cydia for iOS 11.2.2 version. However this is not full functional yet because Cydia is still pending an update by Saurik.

Read more

Cydia Installation with Anzhuang

 
Use the following method to download the Cydia for your iOS 11.2, 11.2.1 or iOS 11.2.2 device.
Step 1 - Open Anzhuang and Tap the Browse the Jailbreak App list link.
Step 2 - You will be redirected the jailbreak app category list of the Pangu8 website.
Step 3 - Tap App manager button.
Step 4 -You can find the Cydia as the 1st app of app manager page. Tap the "Generate code" button. Copy the generated code and paste it into Anzhuang app. Then tap the install button.
Step 5 - It will ask you to provide your device passcode to continue.
Step 6 - It will ask you to provide your device passcode to continue.
Congratulations. Now You have installed the Cydia on your iPhone/iPad.

Please note - System related apps do not work with this Cydia.
Houdini Semi Jailbreak
Now you can install Jailbreak apps, system tweaks and themes with Houdini Jailbreak App manager. Houdini is the latest Semi Jailbreak method for all latest iPhone and iPad models.
Read more about Houdini Jailbreak

Visit following pages if your iOS version differs from iOS 11.2 - 11.2.2.

Pandora Jailbreak

The head of Pandora Lab Song Yang, released one of the screenshots to prove the success of their jailbreak attempt. Unfortunately, Pandora labs (Security researchers at Alibaba’s) did not release any official tool yet. According to them, this jailbreak has introduced as untethered. So users won’t be able to use any IPA or Cydia Impactor tool to complete this. When it is available Pandora jailbreak,You may have to use the same guide as the following.
How works Pandora jailbreak for iOS 11.2.1/11.2?
Pandora Lab
Step 1) - Download Pandora jailbreak tool to your desktop. (The tool is processing yet and it will be released soon.)
Step 2) - Connect your device to the computer using a USB cable.
Step 3) - Disable your Passcode. Enable Airplane mode. Set the device Auto Lock to Never.
Step 4) - Get the backup of your device.
Step 5) - Run the downloaded tool (Windows users must run it as administrator)
Step 6) - The tool will detect the device model & the iOS version of the iPhone/iPad. Click on the start button.
Step 7) - Then click on the “Jailbreak” button.
Step 8) - Let it to complete the jailbreak.
Step 9) - It takes few seconds to complete the Jailbreak process & it will be restarted automatically.
Step 10) - Finally, it will be available Cydia. Then you are able to download and install any third party apps to your jailbroken device.
 
Unfortunately, Velonzy is a paid service. Get it from following guide.
There are two methods available to install Jailbreak apps for iOS 11.2.1 & iOS 11.2.2 versions with Velonzy.
1) Windows/Mac based Jailbreak
2) Online Jailbreak app installer
We recommend to use both of these methods to install the maximum amount of Jailbreak apps to your iOS 11.2.1 or iOS 11.2.2 versions on your iPhone or iPad.
Velonzy is compatible with all Apple devices models even iPhone 7,8 and iPhone X.
Velony is a Freemium service. Users must donate to them to use their service. We have purchased the Velonzy. Now you can get the Velonzy hacked version for free from this website.
1) Windows/Mac based Jailbreak
Step 01 - Download Velonzy Jailbreak toolkit for your computer according to your Operating system.
Open Velonzy Freemium email
2) Online Jailbreak app installer
For this method, you must have registered a freemium account with Velonzy.

Velonzy is a donateware. You must donate any amount of $$$ to register an account with them.
However, We have provided a hacked method to install Velonzy online Jailbreak app installer for free.
Then you will be received the following email. 
Open Velonzy Freemium email
Step 1) Register a Velonzy account, Then open your email from your iOS 11.2/11.2.1/11.2.2 device. Otherwise, tap the above link to register with Velonzy database for free.
Step 2) You can find “Register UDID” button, Tap it to install Velonzy UDID submitter to your device.
Step 3) After the installation of UDID submitter, It allows you to submit your UDID to the Velonzy database.
Step 4) Now you have to install Velonzy online Jailbreak app installer to your iOS 11.2.1 or iOS 11.2.2 iPhone or iPad.
(If you have already submitted your UDID to the Velonzy database using the Computer method, You can skip above steps and You can install Velonzy online Jailbreak app installer directly to your device )
Step 5) Open the Velonzy iOS app, tap the Jailbreak app list link and browse the Jailbreak app categories.
Step 6)  Select a Jailbreak app and generate the developer code for it. Then paste the developer code into the Velonzy app.
Congratulations. Now you have installed your 1st Jailbreak app with Velonzy.

Install Cydia with Velonzy

Step 1) Open the Velonzy app and tap the Jailbreak app list.
Step 2) Tap the  App managers
Step 3) Now you can find the Cydia. Tap the Generate code button to get a developer code for the Cydia. Copy it.
Step 4) Open the Velonzy Jailbreak app installer again, Paste the developer code and tap the “Install” button.
Step 5) You must provide your device password (If you have already set up one) to continue.
Congratulations. You have installed the Cydia with Velonzy. But Please not all system functions are not available with this Cydia.
 
 

New Jailbreak approaches for iOS iOS 11.2.1/11.2.2

We can consider this is the golden era of iOS Jailbreaking. Many security experts are working on the iOS Jailbreaking including Google security research team ( Ian beer and the team) and the Alibaba (the largest e-commerce platform of China) security and research team.
Google's Ian beer has released iOS exploit for iOS 11 and higher versions for the 1st time.
Both of them (Google and Alibaba) have published their exploits for the public. Many hackers are busy with releasing untethered or Semi-tethered Jailbreak for iOS 11.2 to iOS 11.2.2 using these exploits.
kernel level async_awake exploit

This exploit has released by Google security researcher Ian been for Google’s Project Zero.
Helix (h3lix) Jailbreak for iOS 11.2.1

Helix Jailbreak has been released for iOS 10.3.3. Developers have hinted they can be released the new version of Helix Jailbreak for iOS 11.2.1 or iOS 11.2.2.

Downgrade iOS 11.2.1/11.2.2

You can downgrade the iOS 11.2.1 or iOS 11.2.2 to iOS 11.2 version using iTunes. However, all of these iOS versions are almost same.
Anzhuang and Velonzy Jailbreak app installation methods are fully compatible with all of these iOS versions.

New Apple Bug Bounty Program.

Unfortunately, This may be the most significant disturbance for iOS 11.2.1/11.2.2 Jailbreak.Apple just introduced a new Bug Bounty Program who find and Vulnerabilities of iOS.

According to the DMCA laws, Apple can prevent Jailbreaking from the technical end. Apple doesn't hesitate to spend millions of dollars to avoid future jailbreaking offering big cash prizes.
Almost every Public Jailbreak tools are free (donateware) and Hackers cannot earn reasonable money to release jailbreak to the public.

They can easily make big money just selling their exploit to the Apple.
However, This will be the biggest challenge for iOS 11.2.1/11.2.2 Jailbreaking.
Jailbreak Scams for iOS 11.2.1/11.2.2
It has NO any Untethered or Semi tethered jailbreak for iOS 11.2.2/11.2.1 at this time.
If anyone offers you Untethered or Semi tethered jailbreak solution for iOS 11.2.2/11.2.1, it may fake or scam.
Saigon JB online


Abraham Masri, a new teen iOS hacker released Saigon Jailbreak for iOS 10.2.1.

There is no UNTETHERED SaigonJB method for iOS 11.2 or iOS 11.2.1.

zJailbreak (A 3rd party app manager) provides a method to complete the Saigon jailbreak online without using a computer. But it is only for iOS 10.2.1, not for iOS 11.2.1.
Rico Jailbreak

There is no real Jailbreak for iOS 11.2.1 as Rico Jailbreak. Rico Jailbreak team asks you to download iOS App Store app and run it few seconds to install the Cydia for iOS 11.2.1.

Stay away from it. You will get nothing after you install that app.
Pandora JB crack
It is 100% similar to above Rico Jailbreak. Nothing will happen after you download the app which they offer before their Jailbreak.

Pandora Jailbreak has found by Alibaba team. You can find the real information about Pandora Jailbreak from here.
PANGU Kernel Exploit Method
No iOS 11.2.1 online Jailbreak has released by Pangu. Stay away from this Jailbreak. 
 
Also stay away from the getCydiaPRO UNTETHERED, JB ADD, iOS Jailbreak TOP, pangujb11 online UNTETHERED,  iosjail Jailbreak iOS 11.2.1. These are also fake jailbreak methods.
3) LiberiOS - LiberiOS is the 1st Semi tethered Jailbreak for iOS 11.2.2. However, LiberiOS is still in alpha stage, and We do not recommend to use it until we confirm that it may not harm your iPhone/iPad.

How to get zJailbreak free.

Unfortunately, zJailbreak is not free for some countries. Users must donate the developers to get the registration/donation codes to upgrade the zJailbreak app to the Freemium version.
Anzhuang was available with the zJailbreak free version for years. But the zJailbreak developers have added Anzhuang to the upgraded version.
Use the following codes to upgrade zJailbreak for free.
However, We highly recommend to donate money (if you can) to developers to strong them and protect the Jailbreak niche. Most of the developers hesitate to release Jailbreak or Jailbreak alternatives. They are selling exploits and bugs to the Apple for big money.

3) LiberiOS Jailbreak

Jonathan Levin/Morpheus released LiberiOS jailbreak using tfp0 exploit as a semi tethered jailbreak. Users can complete the iOS 11 to iOS 11.1.2 jailbreak with this.
Also it can jailbreak iOS 11.2 to iOS 11.2.2 versions with following LiberiOS guide, if you are a developer. However, you cannot install most valuable jailbreak functions with this jailbreak.
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
Note - We have tested LiberiOS beta version using few devices. Most of devices failed to complete the jailbreak for iOS 11.2/11.2.1/11.2.2 versions. It has high risk and we advice not to use LiberiOS beta version to jailbreak your 11.2/11.2.1/11.2.2 device.
LiberiOS Jailbreak Step Guide for iOS 11.2 - 11.2.2 jailbreak
Step 1) Download LiberiOS IPA and Cydia Impactor using following buttons.
Step 3)   Drag & drop the LiberiOS IPA file into the Cydia impactor.
Step 4)  Provide your Apple ID and the password.
457172 , 971248, 670584 , 219767
General --- > Settings --- > Profiles & Device Management --- > Trust the Enterprise App.
Note - You cannot install jailbreak apps for iOS 11.2 to iOS 11.2.2 with LiberiOS jailbreak at this stage. Wait until release LiberiOS jailbreak public version of iOS 11.2 to iOS 11.2.2 jailbreak.
 
iPA async_wake
C0F3 team & the developer Joseph Shenton have found C0F3 automatic jailbreak as partial jailbreak solution. Mainly they have used V0rtex & async_wake exploits to find this method and It is only compatible upto iOS 11.1.2 jailbreak. Some scammers promote C0F3 jailbreak as async_wake iPA to download Cydia for iOS 11.2.1 version. Stay away from iPA async_wake jailbreak. It is totally fake.
Wait for real jailbreak of iOS 11.1.2 with C0F3 jailbreak. It will be available iOS 10 to iOS 10.3.3 jailbreak as well as iOS 11 & higher jailbreak using C0F3 method.
Semi-tethered LiberiOS has released for iOS 11.1.2. Unfortunately, you can only downgrade iOS 11.2.1/11.2.2 to iOS 11.2 if you haven't saved your SHSH blobs.

At this time, there is no way to downgrade iOS 11.2.1/11.2.2 to iOS 11.1.2 or below version.
They can earn money from offering app downloads to you. They will never jailbreak your iPhone or iPad to install Cydia.
Use trusted sources to know more about the Jailbreak releases. Reddit is always given the true jailbreak information for the latest versions such as iOS 11.2, iOS 11.2.1 & iOS 11.2.2.

Stay away from the following Jailbreak scams. Most of them ask you to complete an online survey or download an app before the Jailbreak.
Cydia Rainbow Jailbreak
Cydia Rainbow Asks you to download an app, and run it about 30 secs to Jailbreak iOS 11.2.2 to install the Cydia for your device.
Jailbreak is the only way to install fully functional Cydia. But, they show they can install Cydia by installing their own app. However nothing will be installed except their own apps.
They will earn money from providing app installations. At least it needs to run the downloaded app for 30 seconds to make them money.
Cydia Rainbow Promotes the fake app installation method through Youtube. Do not trust this scam site.
iOS Jailbreak site
This iOS Jailbreak site same as Cydia Rainbow site. It asks to install two free apps and run each app for 30 seconds to install Cydia.
iOS Jailbreak site asks you to restart the device after the free app installation and finally it will install Cydia app on your device. But nothing install except the free two apps. They earn money through app installation. Do not trust this scam site too.
jail-ios.com
Jail-ios.com site is most common and very popular Jailbreak scam on the internet. It is not a secret that, the jailbreak is the only process to install Cydia. But, this site also show the same free two app installation and running those apps for 30 seconds method to install Cydia. It is completely fake. You cannot install Cydia by installing apps.
Now they are publishing fake videos related to iOS 11.2.2 Jailbreaking. Jail-ios.com is a scam site and do not trust them.
pangujb11.com
Pangujb11.com is another scam site which offering fake Cydia by installing two free apps and running it for 30 seconds. Jailbreak is the only way to install Cydia. Anyone cannot install Cydia by installing apps. They just earn money with highlighting online UNTETHERED jailbreak method is available for iOS 11.2.2. Do not follow this scam site too.
iosjail.com
Same as above sites. They illustrate the installing free apps are the way to jailbreak the device for Cydia. They earn money with offering free apps installation and running its on your device for 30 seconds. Finally, they show the Cydia on your device after the free app installation. It is totally fake as above method. Avoid them without installing free apps.    
getcydiapro.com
getcydiapro.com is another scam site. This site also use two free app installing & running each app for 30 seconds method to install Cydia. However, this site use two special things to prove their are not scammers. They have used apple.com site to show getcydiapro.com site is powered by Apple Company. As the other thing, they try to prove two free apps downloaded is necessary to verify UDID of users iOS device to install Cydia. Do not trust this site too. Totally scam.
Spring Jailbreak tool
Spring Jailbreak developer is DevelopApple. According to him, he is an iOS Security Researcher & Cydia developer. He announced that using his Spring Jailbreak it is possible to jailbreak all the 64 bit devices running iOS 10.3 to iOS 10.3.3 versions. But jailbreak process completely was failed for almost all tested devices. Spring IPA cannot download too. Therefore spring jailbreak is fake.
This same fake jailbreak is promoted by Asautman YouTube channel too.. DevelopApple as well as Asautman provide fake jailbreak as Spring. Do not trust them as well as Spring jailbreak.
JB Add
jbadd.com site also shows two free app installing & running each app for 30 seconds method as the process to install Cydia. It just installs fake Cydia app. You cannot download and Cydia app from it. They earn money promoting free app installation. This site also fake. Do not trust them.
iosjailbreak.top
One of the scam sites for iOS 11.2.1 jailbreak. Nothing install Cydia without two free apps. According to them installing two free apps and running each app for 30 seconds is the way to install Cydia. Installing free apps never install Cydia. It is totally fake and they just earn money from it. Do not follow them for Cydia. Just vist real site to install jailbreak apps or alternative jailbreak apps.
Step 2) Connect your device to the computer. Run the Cydia Impactor on your computer. It will detect your device.
Step 5) It will be available LiberiOS App on your device homescreen. Trust the LiberiOS app before open it.
Step 6) Now open the LiberiOS app on your device homescreen. Click “Do it” button to start the jailbreak process.
Step 7) It will complete the Jailbreak process finally. 

Other jailbreak solution for iOS 11.2-11.2.2

Houdini Semi Jailbreak

You can install the Houdini to iOS 11.2 to iOS 11.2.2 devices using Cydia impactor or zJailbreak online app store.
However, Many functions of Houdini semi Jailbreak may not work with iOS 11.2/11.2.1/11.2.2.
Houdini app allows you to change your iOS system features and functions. We can consider it as an alternative to the Cydia.
Important -
According to the developers, Houdini is not a Full Jailbreak method. Developers have no plan to upgrade it to the full Jailbreak.
You can install deb files of Jailbreak apps using Houdini. ( Not for iOS 11.2/11.2.1 users)
Most popular features of Houdini
Some of these features are not compatible with iOS 11.2 to 11.2.2
* Change iOS default theme adding custom masks to icons.
* Block ads entirely. (no need to upgrade apps to disable ads)
* Add awesome Emoji collections to your device.
* Customize your boot logo.
* You can use your face to the Animoji.
How to install Houdini
You can install Houdini using both of following methods, But please keep in mind, It may not be fully compatible with iOS 11.2 to 11.2.2.
Install Houdini from zJailbreak
Step 1)  Install zJailbreak from above method.
Step 2) Open zJailbreak and tap the Houdini. Then it will appear a popup window. Tap install link to install the Houdini.
Step 3) After the installation, Go to Settings, General and Device & Profile management, Open Houdini and tap the trust link.
Now you have installed Houdini Semi Jailbreak for your iOS 11.2/11.2.1/11.2.2 iPhone/iPad.
Install Houdini from the Computer
This method is somewhat difficult than above method. You must download the Cydia impactor according to your Computer (Windows or Mac).
Step 1) - Download Houdini iOS 11 IPA iOS 11 IPA  to your computer.
Step 2) - Open Cydia Impactor and drag Houdini IPA to the Cydia impactor.
Step 3) - Type your Apple ID and password. You can create a new Apple ID from here.
Step 4) - Go to Settings, General and Device & Profile management, Then Trust the developer of the Houdini.

Congratulations, Now you have installed Houdini for your iOS 11.2/11.2.1/11.2.2 device.


Please note - Most of Houdini functions may not work with iOS 11.2/11.2.1/11.2.2.
Jailbreak iOS 11
Jailbreak iOS 11.1 - iOS 11.1.2
Jailbreak iOS 11.2.5 (Beta)
We have also found the massive amount of Fake/scam Jailbreak methods from the Internet. Stay away from these Fake Jailbreak methods.
Users can install Cydia and popular Jailbreak apps using dev code extraction method from Anzhuang.
You cannot install Anzhuang directly to your iPhone/iPad. You must have installed the 3rd party app stores such as zJailbreak, Xabsi or iExtras before installing the Anzhuang.
Go to zJailbreak website      
Go to Xabsi website
Go to iExtras website
You can install Anzhuang iOS 11.2/11.2.2 Jailbreak installer from above App stores. 
Watch these videos to find the free method to install Anzhuang on your iPhone/iPad
We have tested Anzhuang Jailbreak app installer using iOS 11.2.2 running iPhone 7, iPad Air 2 iPhone 8 plus and iPhone X.
It had worked flawlessly with all above iPhones and iPads. We can assume that it will work with all iOS 11.2/ 11.2.2 running all iPhone/iPad models.
Step 2) Tap “Install zJailbreak” button and provide the password to continue the installation.
Step 3) Open zJailbreak app. You can find the Anzhuang iOS 11.2.2 Jailbreak app installer on most popular app section of the zJailbreak app.
Step 4) Tap Anzhuang install button to install it on your iOS 11.2/11.2.2 running iPhone or iPad.
Note - Anzhuang installation process from Xabsi or iExtras is almost same to the above guide.