Downgrade iOS 8.4.1 to iOS 8.4
You cannot downgrade iOS 8.4.1 version to iOS 8.4 at this time.
You can jailbreak your iOS 8.4.1 version to iOS 8.4 at this time, But Apple will stop the downgrade option soon, Full jailbreak is not available at this time and jailbreak will be very hard according to rumors.
Jailbreak iOS 8.4.1
Currently, full functional Jailbreak is not available for iOS 8.4.1. You can Jailbreak iOS 9 -9.0.2 using Pangu9 Jailbreaking tool. Pangu 9 tool is not compatible with iOS 8.4.1. You can only upgrade your iOS 8.4.1 device to iOS 9.2 at this time. Full Jailbreak is not available for iOS 9.1 also. However, you can use SemiJB partial Jailbreak tool to Jailbreak your iOS 8.4.1 device. You can install the Cydia using Semi Jailbreak.
Yalu Jailbreak source code is also available for iOS 8.4.1 Jailbreak. It is only for the developers. Please check below this page to download the Yalu Jailbreak source code for iOS 8.4.1
How to Semi Jailbreak iOS 8.4.1
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Semi Jailbreak is available for iOS 8.4.1. It is a super easy online process. You can reverse it anytime without restoring your device.
How to Semi Jailbreak iOS 8.4.1
Step 1 - Make sure that your iOS version is iOS 8.4.1 before starting the Semi Jailbreak. Just click this link from your iOS device to find your iOS version
Step 2 - Open the Safari browser of your iPhone, iPod or iPad. You cannot semi jailbreak your iOS 8.4.1 device with any other browser.
Step 3 - Just visit our Semi Jailbreak script page, type the following URL on the address bar of your Safari browser.
Otherwise, search on Google as "iOS 8.4.1 Jailbreak" to find this page or visit SemiJb official site (semijb.com) directly to start the process.
Step 4 - Tap the "Semi Jailbreak now" button. Then it checks your system compatibility within few seconds
Step 5 -You can continue if your device is compatible with Semi jailbreak. Just tap the "I agree to continue" button
Step 6 - Now semi JB process will start, don't touch your device or close the Safari browser during the process. It may take 1-2 minutes to complete.
Step 7 - It redirects and asks you to install the Semi JB application after the iOS 8.4.1 jailbreak process. Tap install link to continue, You must type your security code to install the app.
Step 8 - Then it takes you again to the Safari browser, Tap "OK, I am done" button to complete the process, Now your iOS 8.4.1 Jailbreak process is complete.
Now you can install the vShare and Cydia, vShare is the default app manager of the SemiJB,
Yalu Jailbreak for iOS 8.4.1
Luca Todesco has exploited and released the Yalu Jailbreak on 7th of this October. This Jailbreak is also known as the "TocTou Jailbreak". Still he hasn't released the public jailbreak tool for the Yalu/TocTou Jailbreak. However he has released the source code of this jailbreak to public. Currently we are working to study this code, optimize it and release a Jailbreak tool to public. You can also download this iOS 8.4.1 Jailbreak source code and try to optimize and develop the tool if you have a knowledge about iOS hacking.
However 3 million dollars are waiting if anybody could develop the source code for jailbreak for iOS 9, 9.0.1 or 9.0.2. ZERODIUM Has officially announced that they will offer one million dollars to the person who releases the iOS 9 jailbreak for public. Then Chaouki Bekrar (CEO of ZERODIUM) has raised this price to 3 million dollars. ZERODIUM is the reputed and multi million Cyber security company. Go to their official site to find more information.
However Currently Cisco Systems and Symantec Corp are the giants of the cyber security field. Cisco Systems has 22620 Million dollars Market cap. However, we can expect that more security companies offer the prices in future to encourage the jailbreak hackers.
Download the Yalu Jailbreak Source code for iOS 8.4.1
Pangu Team demonstrate for iOS 8.4.1 jailbreak
Pangu 8 just released the Jailbreak demonstration at HackPwn Summit, Apple just confirmed that they have patched the Taig 2 exploitation. We really didn't believe that anybody could find the iOS 8.4.1 jailbreak so soon. HackPwn is a Chinese security related company. They organized a summit called as "HackPwn security geeks carnival" Pangu Team demonstrated their iOS 8.4.1 jailbreak at this summit for first time.
However, There is no news about Pangu's iOS 8.4.1 jailbreak tool, They will develop the iOS 8.4.1 jb tool as separate tool from Pangu iOS 8 to iOS 8.1.2 tool. Pangu team has already demonstrated iOS 8.3 jailbreak at Shanghai MOSEC summit but they didn't release this jailbreak for Public. Taig team released the iOS 8.3 jailbreak for the first time to Public
Apple disabled the option for iOS 8.4.1. Now you cannot downgrade your iOS 8.4.1 version to iOS 8.4 version and jailbreak the iOS 8.4 using TaiG 2 (windows) or PPJailbreak (mac). This is the most suitable option at this time.
Common troubleshootings of iOS 8.4.1 Jailbreak process
Semi JB errors are very rare when comparing with TaiG and PPJailbreak, Semi Jailbreak is an online process,Therefore you don't need to install iTunes or any other software. However you may get the following errors with the SemiJB, You can easily fix all of these errors.
It doesn't redirect you to Semi JB app installation page
It should take you to Semi JB app installation page after the SemiJB process. Sometimes it takes you to your setting app and you can't find the install link of SemiJB App. Then please exit from the "Settings" and open the Safari browser, Tap the "install the App" button
Semi JB app as white blank screen
After the process you have to install the vShare and Cydia using SemiJB app, But rarely you will only see the white blank screen when you tap the SemiJB app icon. Make sure that your internet connection is OK, Otherwise you have to redo the SemiJB process.
Stick the Semi JB process
It should start the iOS 8.4.1 Jailbreak process when you tap the "agree" button, Sometimes it sticks with SemiJB process screen, Just allow 20-30 seconds, After that exit from Safari and restart the process
iOS 8.4.1 Jailbreak with Taig 2 Jailbreak
Apple patched the TaiG 2 and PPJailbreak with iOS 8.4.1, PPJailbreak team also used the TaiG 2 exploitation with their PPJailbreak tool.
iOS 8.4.1 is currently not compatible with TaiG 2 jailbreak. You cannot upgrade your device to 8.4.1 to iOS 9 - 9.0.2 version because Apple has already disabled iOS 9 - 9.0.2 signing status. Therefore, you can only upgrade to iOS 9.2 version at this time.
Currently full function jailbreak is not compatible with iOS 9.2 version. However, still you can use our partial jailbreak to perform iOS 9.2 version.
Now you must care to protect your Jailbreak, We recommend you to save your SHSH blobs using Tiny umbrella.
How to save SHSH blobs to upgrade the iOS 8.4.1
Now you cannot downgrade iOS 8.4.1 to below versions. Apple already disabled downgrade option.
Still you can downgrade iOS 8.4.1 to iOS 8.4. Apple will disable the default downgrade option soon. Therefore you must have saved your SHSH blogs using tiny umbrella, Then you can downgrade your device to iOS 8.4 anytime
Download latest version of the TinyUmbrella. Go to this website, then you can find the download the TinyUmbrella links on the right hand corner of the website. Download the TinyUmbrella version according to your Mac/Windows OS.
Run the tool and Connect your Device to computer
TinyUmbrella detects your device. Just right click your device under the "connected menu" then click the "Fetch SHSH on device"
Then you can use this SHSH blobs when you downgrade your iOS 8.4.1 OS to iOS 8.4
Cydia Download for iOS 8.4.1
You cannot download the full functional Cydia to your iOS 8.4.1 device, However you can download the Cydia with limited functions with Semi jailbreak
Semi JB Server busy, please try again later message
Rarely you may get this message, Please try again after 1-2 hours to skip this error
Not compatible with SemiJB message
This is not an error, Some old devices are not compatible with semi Jailbreak even if you can update it to iOS 8.4.1.