Why can't you downgrade your iPhone? Installing custom firmware and downgrading

A tool called iDeviceReRestore that allows you to downgrade the iOS firmware on all 32-bit iPhones, iPads and iPod Touches. The utility is available for download and installation on computers running macOS and Linux, while a Windows version will be released in the next few weeks.

Downgrading the firmware version on 32-bit iPhones and iPads is extremely easy and simple, and you don’t even need a jailbreak installed on the device. However, like any software with similar functionality, there are several mandatory requirements. If at least one of them is not met, then iOS downgrade will not be possible.

Requirements for downgrading iOS versions:

• 32-bit iPhone, iPad and iPod Touch
• iOS 9.X firmware installed on the device at the time of using iDeviceReRestore
• Mac or Linux computer
• Pre-saved SHSH certificates from the required firmware

If all these requirements are met, then you can safely begin the process of downgrading the OS version for iPhone, iPad and iPod Touch. This whole process comes down to an extremely simple sequence of actions, for which, of course, you should prepare in advance.

As the developers of iDeviceReRestore themselves assure, this exploit allows you to downgrade the firmware from iOS 9.X to iOS 6, iOS 7, iOS 8, another version of iOS 9 and even iOS 10. In this regard, you should obtain the file in advance the required version OS with ipsw extension. You can download all previously released firmware for iPhone, iPad and iPod Touch.

Now that the firmware has been successfully downloaded, you should download the iDeviceReRestore utility from the official developer website. When the exploit is downloaded and unpacked into a folder, you should open it and place the corresponding certificates saved earlier inside the SHSH folder.

Connecting required iPhone, iPad and iPod Touch to Mac computer or Linux (other devices Apple is better disconnect for the duration of the downgrade). Switches the device to (this is important). We launch the “Terminal” application and drag two files into its window at once - idevicererestore.exec and the file of the required firmware version. As a result, something like this should appear in the terminal ./idevicererestore -r 8.2.ipsw

If everything was done correctly, then pressing the Enter key on the keyboard will begin the process of downgrading the operating system version iOS systems to the selected one. If there is any problem related to the libimobiledevice library, you can solve it with the following command in the terminal: brew install libimobiledevice

After a few minutes, the iPhone, iPad and iPod Touch should turn on and work already running that version operating system, which was installed on it manually, bypassing iTunes and Apple servers.

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After updating to a new version of iOS, you may notice that you do not like the firmware. In this case, there is an excellent solution - roll back the software to the optimal version, in your opinion. That is, if you updated to, for example, IOS 10, then you can easily install it on your iOS device 8 using the instructions below.

When is it necessary to rollback iOS?

Reasons to install more old version operating system may become the following circumstances:

• With new firmware versions, the design changes, and not all users may like the new design.
• The most common reason is the appearance of freezes and glitches. Such problems happen for two reasons: either a new version of the firmware has become available to users in a too crude form, with errors in the code and shortcomings, or the device that was updated has become outdated for the loads created by the new version of IOS.

Please note that it is not possible to roll back any device for any version, detailed information You can view which device to which firmware version can be rolled back to on the following website - http://appstudio.org/shsh. All data is located in table format.

How to roll back iOS to a specific version on an Apple device

Before you begin the process, you need to prepare the following things:

• iTunes installed on your computer and updated to latest version.
• Your chosen version downloaded to an easily accessible folder software, having the IPSW format. You can download it from trusted websites that distribute IOS firmware for free, for example, using the following link - http://appstudio.org/ios. Download the firmware strictly for your device model, otherwise problems will arise during installation.
• A USB adapter that will connect your device to your computer.

If you have met all the above conditions, then the next step is to prepare the device itself for the rollback process.

Saving important data

Please note that when you roll back your device, all data, applications and media files from it are permanently erased, so it’s worth taking care of them. There is an option that allows you to delete files from the device, it will be discussed later in the article, but it is no less stable. You can save everything you need using a backup copy created as follows:

Disable password

Another important point is to disable the password and Touch ID, if it is supported and enabled on your device.

Deactivating Find My iPhone

Before any actions with the device firmware, you must disable the “Find iPhone” function, since, in otherwise, iTunes simply will not allow you to perform any actions:

Firmware rollback

If all previous preparatory work has been carried out, then you can begin the rollback itself. It doesn't matter which device you're downgrading from, or from which version of iOS you're downgrading to.

1. Connect the device to the computer using a USB adapter.
2. Log in to the system.
3. Go to your device's settings by clicking on the icon that looks like a phone or tablet.
4. Hold down the Shift button on your keyboard if you're using Windows, or the Option button if you're using Mac OS. Without releasing the key, click on the “Restore” button.
5. A window with folders will open; you need to specify the path to the firmware that you downloaded earlier.
6. Wait while iTunes extracts the software from the firmware and installs it. The process can last from five minutes to half an hour, do not disconnect the device from the computer or interrupt the process with any actions, otherwise the device may enter endless recovery mode.

Rollback without data loss

This rollback option also exists; it allows you to rollback without losing the data on the device. To do this, in point 4 of the “Rolling Back Firmware” section, you need to click on the “Restore” button and the “Update” button. All other steps are completely the same. The only thing worth considering is that the execution full recovery, that is, resetting the system and installing it from scratch is safer, since the chance that previous version some elements will remain much lower.

Video tutorial: How to downgrade iOS version

Third party rollback programs

If for some reason the iTunes method does not suit you, then you can use the third-party program RedSnow. It is distributed free of charge for both Windows and Mac OS on the official website of the developer - http://redsnow.ru.

1. After downloading and opening the program, select the Extras section.
2. Click on the Even More button.
3. In the menu that opens, go to the Restore block.
4. Click the IPSW button to specify the path to the previously downloaded firmware.
5. The notification that appears will ask you whether to cancel the modem upgrade or not. Click on the “Yes” option.
6. A window will open in which you will be warned that the device will now need to be put into recovery mode, close it.
7. Connect the device to the computer using a USB adapter and enter it into DFU Mode. How to do this is described step by step in the program itself.
8. If you have not previously performed such rollback operations with this program, then click on the Remote button so that it will automatically find the necessary hashes on its servers.
9. Done, now all you have to do is wait for the process to finish. The device will automatically update to the version you downloaded and turn on, after which you will have to go through the initial setup process.

Is it possible to roll back individual applications?

If the purpose of your system rollback is to install older versions of applications, then you should not carry it out, since there is a better option - use special program App Admin. You can download it directly from App Store for free. Thanks to this application, you can view all available versions applications installed on your phone and roll back to them. To use the program, just select the applications to roll back and enter the unique version number to which you want to roll back the selected application.

So, installing an older version of software is possible on all Apple devices, but you can not roll back to any version, but only to those that have the SHSH signature. The process can be completed either through the official iTunes app, and through third party programs. The main thing is to download correct version firmware and do not interrupt the update process until it is fully completed.

This article is intended for those who use devices with an A4 processor (iPhone 4, iPhone 3GS, iPod touch 4G), but wants to downgrade (downgrade the firmware) to iOS 5.1.1 and get . To do this, you will need firmware 5.1.1 (we remind you that Apple has no longer signed iOS 5.1.1).

In addition, you will need the latest public version of the tool RedSn0w. In this utility we will use the so-called “Stitching” option, which will link your certificate to the required firmware.

So, what steps need to be taken to downgrade from iOS 6 to iOS 5.1.1:

5. Check that you have saved the SHSH certificate (). If you saved SHSH in Cydia, then simply skip this step. If SHSH is saved on your computer, then place it in the same folder with iOS 5.1.1 firmware.

6. Connect the device to USB and transfer it (hold the screen off button for 3 seconds, then hold the screen off button and hold the Home button for 10 seconds; after that, continue to hold the Home button, but release the screen off button).

7. Launch RedSn0w 0.9.14b2, go to Extras -> SHSH blobs -> Stitch.

8. Select an item IPSW and specify the path to firmware 5.1.1 for your device.

9. If you saved SHSH via Cydia, then in the section Blobs select item Cydia. If you saved SHSH on your computer, then select Local and specify the path to the file.

10. Once the firmware file and SHSH are selected, RedSn0w will start stitching them together to create the final firmware that can be used even though Apple has stopped signing iOS 5.1.1.

11. In RedSn0w, go back a couple of pages and select Pwned DFU - this will put your phone into Pwned DFU mode. Thanks to this, you can restore to the firmware received in step 10 via iTunes. Otherwise, .

12. Open iTunes. The program should automatically detect that your device is in recovery mode. Hold down the Option button (in the case of Mac) or Shift (in the case of Windows) and click on the button in iTunes Restore. In the window that appears, select the firmware you created in RedSn0w.

13. Wait for iTunes to complete restoring the firmware. During this process, iTunes may display a "-1" error. If this happens, open RedSn0w, select Extras -> Recovery fix. Put your device into DFU mode.

14. After the Recovery fix process is completed, your device will be completely restored to iOS 5.1.1. Congratulations!

If you strictly followed all the instructions, then the firmware downgrade should be successful. Do not forget that this instruction only fits certain devices(iPhone 4, iPhone 3GS and iPod touch 4G).

A few minutes ago, a group of hackers from the iPhone Dev Team released new version instrument The updated jailbreak application allows iPhone owners 4S, iPad 2 and iPad 3G downgrade the iOS software platform without using iTunes.

The developers were able to implement this feature without using a bootrom vulnerability. As it became known, hackers discovered a hole in the APticket key system, which are generated in a unique way when restoring the firmware.

Until this point, rolling back the iOS 5 operating system was only available to owners of older devices on the A4 chip. Previously, we published detailed information for them. Using the new version of Redsn0w, owners of iPhone 4S, iPad 2 and iPad 3 can repeat this.

The main condition for successful completion of the procedure: the presence of saved SHSH certificates blobs and APTicketSHSH. In this case iPhone users 4S and iPad 2 running iOS 5.1 can roll back to iOS 5.0.1 and take advantage of untethered jailbreak. Owners iPad third generation, an option is available with a downgrade to iOS 5.1 and the use of the upcoming release.

Note:

• The procedure assumes that you have saved SHSH blobs and APTicket certificates from an old version of iOS locally or remotely in Cydia. Otherwise, you will not be able to rollback iOS 5.1.1.
• Due to the way this technology works, Redsn0w first updates the device to latest firmware modem and therefore increases baseband version. In other words, this method Not suitable for unlocked iPhone.
• Version Redsn0w 0.9.11b1 can only be used to downgrade the firmware of devices on A5 and A5X. For gadgets on A4 you need to download.

How to downgrade iOS 5.1.1 to iOS 5.1, 5.0.1 for iPhone 4S, iPad 2 and iPad 3G:

Step 1: Download the appropriate firmware: , or

Step 2: Download Redsn0w 0.9.11b1 for Windows or Mac.

Step 3: Backup the contents mobile device via iTunes or iCloud.

Step 4: Launch Redsn0w and connect your device to your computer via USB.

Step 5: Click the Extras button, then Even More, and then Restore.

Step 6: You will see three options: IPSW, Local and Remote. Click on the IPSW button and specify the Redsn0w firmware downloaded in step 1.

Step 7A: If you saved SHSH locally, click the Local button and point Redsn0w to the .plist file with the digital certificate for your device. Skip Step 7B.

Step 7B: If the certificate is saved in Cydia, put your device into DFU mode. Your iPhone, iPod touch, or iPad screen should be blank (black). The Remote button will now be active. Click on it, after which the program will create a new IPSW file with attached certificates.

Step 8: Click Next.

Step 9: At this stage, Redsn0w will independently make the SHSH blobs binder to the specified IPSW firmware file and automatically install it on the gadget.

Step 10: Congratulations, you have downgraded iOS 5.1.1 to iOS 5.0.1 or 5.1 for iPhone 4S, iPad 2 and iPad 3G!

Now you can easily implement untethered jailbreak iOS 5.0.1 for iPhone 4S or iPad 2. To do this, just download and contact our detailed manual, published.

As mentioned above, third-generation iPad users can downgrade to iOS 5.1 and wait for the upcoming solution from the Pod2g hacker. , a new exploit that promises an untethered jailbreak of iOS 5.1 for all iPhone, iPad and iPod touch models will be released in the coming weeks.

• Console Sony Playstation 3 with official software 3.55 or the version below. Firmware 3.56 and higher are not yet supported.
• Flash drive or USB HDD, formatted in the FAT32 file system.

Preparing for PS3 firmware

Check the software version of the set-top box on this moment. You can do this as follows: go to the PS3 menu in the section “Settings” - “System Settings” - “System Information”. The screen will indicate the current software version of your set-top box.

1. Installation of the official software update version 3.55.

If you already have firmware 3.55 installed, then proceed to the installation (as I wrote above, consoles with software version 3.56 or higher are not yet flashed).
Make sure that file system the media used (USB HDD or flash drive) is FAT32, if your console “sees” its contents, then the flash drive is already formatted in FAT32. Create a folder in the root of your USB storage device with the name "PS3" and the subfolder "UPDATE" (observing the specified case). Download the archive from official update Software up to 3.55, unzip it and copy the file official firmware“PS3UPDAT.PUP” to the previously created PS3/UPDATE directory. Connect the USB flash drive to the Playstation 3 console and select from the menu System update - Update from storage media. The set-top box will update. Once the installation is complete, the PS3 will turn off, now turn it on and check the software version - 3.55.

2. Installation of custom firmware 3.55 kmeaw.

Download custom firmware 3.55 kmeaw and run it. Specify the path to the flash drive, installation will be performed on it. Connect the flash drive to the console. Now you need to completely turn off the power to the Playstation 3 (switch the toggle switch on the back - FAT models, pull out the power cord - Slim models). Turn on the power of the set-top box again. Press and hold the power button of the set-top box until it turns on and turns itself off again (about 30 seconds). Press the button again and hold it until the set-top box emits a short beep twice. After the signal, release the button. The Playstation will boot into recovery mode.
Connect the joystick with a wire, press the “PS” button and select “System update”. Playstation 3 will begin installation custom firmware kmeaw.
After the console completes the update and reboots, two new items should appear in the “Game” menu: "Install package files" And "/app_home/PS3_GAME".

Installing the multiMAN manager to run games on custom firmware.

multiMAN is considered the best manager to run games on custom firmware.
Download multiMAN 2.03.00 and the BDEMU Blu-Ray drive emulator, copy the files to the root of your flash drive and connect it to the Playstation 3. Through the menu "Games" - "Install Package Files" On the console, use the “X” button of the joystick to first set multiMAN, then BDEMU. A drive emulator is necessary because in the latest version the developer removed the ability to run backups.

Write the games that you will download from torrents to an external drive or flash drive. On external drive create a folder “GAMEZ” in the root, and inside it folders with game code.

Attention! To avoid startup errors, check the correct sequence of folders, since if you add directory subsections to the game path, the game will not start.

How to run the game on custom firmware

Go to the multiMAN manager and press the “X” button on the game - the game image will be mounted and a new icon will appear in the “Game” menu: if any Blu-Ray disc is inserted into the console drive, the game will appear in the disk section, if there is no disc in the drive, in /app_home/ps3_game).

Attention! Not all games come without a disc; some require any Blu-Ray disc in the console drive.

Downgrade on PS3 consoles with firmware 3.56 - 4.46 (firmware rollback)

Downgrade (from English - downgrade)- this is the use of old device software. Downgrade, as an operation with a device, is used to roll back the firmware due to the greater stability of the earlier firmware or the possibility of any manipulations with the device. Owners of a PS3 console with firmware 3.56-4.46 can use a special device - E3 Flasher, which can lower the console firmware, that is, perform a downgrade. E3 Flasher is a special chip that is installed inside the set-top box to provide the ability to roll back to an earlier version of the firmware, respectively, to install a custom one.

Downgrading, as a rule, is done to custom firmware 3.55, since this particular firmware is completely hacked. After downgrading to an earlier firmware version, you can install custom firmware Rogero 3.55 v.3.7 or (or Kmeaw 3.55 - instructions in this article).

Conditions under which a PS3 downgrade is possible:

• The Date Code of the set-top box must be no higher than 1B (this means that the set-top box must be produced no later than the 2nd quarter of 2011). You can view the Date Code on the back of the console. Let's say 9D and 0C are suitable, since the consoles were released in the 4th quarter of 2009 and the 3rd quarter of 2010, respectively. 1C, 1D - no longer suitable (3rd, 4th quarters of 2011). Also, your PS3 memory must be NOR type, as indicated by the following model numbers: CECHH, CECHJ, CECHK, CECHL CECHM, CECHP, CECHQ
• Your console's factory firmware must be below 3.60.
• Slim version consoles with model number 3000 cannot be downgraded.