Recently Apple released iOS 11.2.5 with support for HomePod, Siri News and other improvements and bug fixes. Earlier today, it became known about the upcoming release of the exploit of Russ Cox from Google, on the basis of which it will be possible to create an untethered jailbreak for iOS 11.2.2 - iOS 11.2.
How to roll back from iOS 11.2.5 to iOS 11.2.2 on iPhone and iPad

If you have already updated to iOS 11.2.5, but in the future would like to install a jailbreak, then it's worth to roll back to iOS 11.2.2, while Apple still signs the files of this firmware.

Important details

  • You can roll back only to iOS 11.2.2. It is not possible to roll back to older versions of the system, since Apple no longer signs them.
  • One of the main rules of jailbreaking is not to update to the latest available version of iOS. This always increases your chances of installing a jailbreak. If you currently have iOS 11.1.2 or lower, update to 11.2.2 we are also not recommended.

Check the status of the firmware signature

To find out if Apple signs the file of the correct firmware version, go to this site . A green tick means the firmware is signed, and you have the option to roll back to this version.

Method # 1

This is a more risky way, but it allows you to rollback without losing your data. He is also much faster than the second.
  • Disable  Find the iPhone in Settings (Settings> iCloud> Find iPhone).
  • Download the iOS 11.2.2 firmware for your device. References are attached at the end of this article.
Note:  If you are downloading a file through Safari, disable automatic unzipping or use another browser. You can also rename the .zip file to an .ipsw file.
  • Connect your device with iOS 11.2.5 to your computer.
  • Launch iTunes and select your device in the upper left corner.
  • In the menu on the left, click Browse.
  • Hold down the Alt / Option key on the Mac or Shift on the Windows PC and click Refresh.
  • Select the iOS 11.2.2 IPSW file that you downloaded earlier.
  • iTunes will notify you that your device will be updated to iOS 11.2.2.
  • Click  Update.
  • iTunes will start the process of rolling back to iOS 11.2.2.

Method # 2

This is a safer method, but it will take more time. It is necessary to restore the data from a backup copy. It will be possible to restore only with a copy of iOS 11.2.2 and below, and some data will be lost.

Notes:

  • The method involves resetting the device and restoring it from a copy, so it may take some time for it, depending on the amount of data recovered and the speed of your Internet connection.
  • It is only suitable for those who have a backup copy of the device in iCloud or iTunes.
  • A standard copy of iCloud or iTunes is likely to be based on iOS 11.2, so with the recovery to iOS 11.2.2 there may be problems.

Instructions

  • Download the iOS 11.2.2 firmware for your device. You can find the download links at the end of this article.
Note:  If you are downloading a file through Safari, disable automatic unzipping or use another browser. You can also rename the .zip file to an .ipsw file.
  • Enter your device in recovery mode (DFU). If you do not know how to do this, you will find detailed instructions here . Or just follow the steps below.
  • Connect your device to the computer.
  • Disconnect the device by holding down the power button, and then following the slider on the screen.
  • Press the power button for 3 seconds.
  • Do not release the power button, hold down the Home button for 10 seconds.
  • Release the power button, but keep holding the Home button until iTunes notifies you that the device is in Restore mode.
  • Hold down the Alt / Option key on the Mac or Shift on a Windows PC, and then click Restore iPhone ... (iPad / iPod touch) . 
Note:  If you do not press the desired key on the keyboard, your device will recover to iOS 11.2.5.
  • Select the iOS 11.2.2 IPSW file that you downloaded earlier.
  • Click  Restore and Update.
  • The next window will show information about updating iOS 11.2.2. Click Continue and  Accept.
  • Now iTunes will install an update on your device. The process should take about 10 minutes.
  • After a successful restore to iOS 11.2.2, you will see a white screen on your device. Follow the instructions on the screen to configure your device, and then restore your data to a saved copy.
That's all. Your iPhone, iPad or iPod touch should successfully roll back from iOS 11.2.5 to iOS 11.2.2.

In case of errors

If you come across a message that your device is incompatible with this version of the software, most likely you downloaded the wrong firmware file. Check and try again.

Download links for iOS 11.2.2 firmware

iOS 11.2.2 (iPhone 5s GSM):  iPhone_4.0_64bit_11.2.2_15C202_Restore.ipsw
iOS 11.2.2 (iPhone 5s GSM + CDMA):  iPhone_4.0_64bit_11.2.2_15C202_Restore.ipsw
iOS 11.2.2 (iPhone 6 Plus):  iPhone_5. 5_11.2.2_15C202_Restore.ipsw
iOS 11.2.2 (the iPhone 6):  iPhone_4.7_11.2.2_15C202_Restore.ipsw
iOS 11.2.2 (the iPhone 6s):  iPhone_4.7_11.2.2_15C202_Restore.ipsw
iOS 11.2.2 (the iPhone 6s Plus is):  iPhone_5.5_11.2.2_15C202_Restore.ipsw
iOS 11.2.2 (iPhone SE):  iPhone_4.0_64bit_11.2.2_15C202_Restore.ipsw
iOS 11.2.2 (iPhone 7 GSM + CDMA):  iPhone_4.7_P3_11.0_11.2.2_15C202_Restore.ipsw
iOS 11.2. 2 (iPhone 7 Plus GSM + CDMA): iPhone_5.5_P3_11.0_11.2.2_15C202_Restore.ipsw
iOS 11.2.2 (the iPhone 7, the GSM):  iPhone_4.7_P3_11.0_11.2.2_15C202_Restore.ipsw
iOS 11.2.2 (the iPhone 7, the GSM Plus is):  iPhone_5.5_P3_11.0_11.2.2_15C202_Restore. ipsw
iOS 11.2.2 (iPhone 8 GSM + CDMA):  iPhone_4.7_P3_11.0_11.2.2_15C202_Restore.ipsw
iOS 11.2.2 (iPhone 8 Plus GSM + CDMA):  iPhone_5.5_P3_11.0_11.2.2_15C202_Restore.ipsw
iOS 11.2.2 (iPhone 8 GSM):  iPhone_4.7_P3_11.0_11.2.2_15C202_Restore.ipsw
iOS 11.2.2 (iPhone 8 Plus GSM):  iPhone_5.5_P3_11.0_11.2.2_15C202_Restore.ipsw
iOS 11.2.2 (iPhone X GSM + CDMA):  iPhone10 , 6_11.2.2_15C202_Restore.ipsw
iOS 11.2.2 (iPhone X GSM): iPhone10,6_11.2.2_15C202_Restore.ipsw
iOS 11.2.2 (iPad Air WiFi):  iPad_64bit_11.2.2_15C202_Restore.ipsw
iOS 11.2.2 (iPad Air Cellular):  iPad_64bit_11.2.2_15C202_Restore.ipsw
iOS 11.2.2 (iPad Mini 2 Wi-Fi):  iPad_64bit_11.2.2 _15C202_Restore.ipsw
iOS 11.2.2 (iPad Mini 2 Cellular):  iPad_64bit_11.2.2_15C202_Restore.ipsw
iOS 11.2.2 (iPad Air China):  iPad_64bit_11.2.2_15C202_Restore.ipsw
iOS 11.2.2 (iPad Mini 2 Cell ):  iPad_64bit_11.2.2 _15C202_Restore.ipsw
iOS 11.2.2 (iPad Mini 3 Wi-Fi):  iPad_64bit_TouchID_11.2.2_15C202_Restore.ipsw
iOS 11.2.2 (iPad Mini 3 Cellular):  iPad_64bit_TouchID_11.2.2_15C202_Restore.ipsw
iOS 11.2.2 (iPad Mini 3 China): iPad_64bit_TouchID_11.2.2_15C202_Restore.ipsw
iOS 11.2.2 (iPad Air 2 Wi-Fi):  iPad_64bit_TouchID_11.2.2_15C202_Restore.ipsw
iOS 11.2.2 (iPad Air 2 Cellular):  iPad_64bit_TouchID_11.2.2_15C202_Restore.ipsw
iOS 11.2.2 (iPad Mini 4 Wi-Fi):  iPad_64bit_TouchID_11.2.2_15C202_Restore.ipsw
iOS 11.2.2 (iPad Mini 4 Cellular):  iPad _64 bit _ TouchID _11.2.2_15 C 202_ Restore . ipsw
iOS 11.2.2 (iPad Pro Wi-Fi):  iPadPro _12.9_11.2.2_15 C 202_ Restore . ipsw
iOS 11.2.2 (iPad Pro Cellular):  iPadPro_12.9_11.2.2_15 C 202_ Restore . ipsw
iOS 11.2.2 (iPad Pro 9.7 Wi-Fi):  iPadPro _9.7_11.2.2_15 C 202_ Restore . ipsw
iOS 11.2.2 (iPad Pro 9.7 Cellular):  iPadPro _9.7_11.2.2_15 C 202_ Restore . ipsw
iOS 11.2.2 (iPad 5 Wi-Fi):  iPad _64 bit _ TouchID _ ASTC _11.2.2_15 C 202_ Restore . ipsw
iOS 11.2.2 (iPad 5 Cellular):  iPad _64 bit _ TouchID_ ASTC _11.2.2_15 C 202_ Restore . ipsw
iOS 11.2.2 (iPad Pro 12.9 Wi-Fi 2nd Gen):  iPad_Pro_HFR_11.2.2_15C202_Restore.ipsw
iOS 11.2.2 (iPad Pro 12.9 Cellular 2nd Gen):  iPad_Pro_HFR_11.2.2_15C202_Restore.ipsw
iOS 11.2.2 (iPad Pro 10.5 Wi -Fi):  iPad_Pro_HFR_11.2.2_15C202_Restore.ipsw
iOS 11.2.2 (iPad Pro 10.5 Cellular):  iPad_Pro_HFR_11.2.2_15C202_Restore.ipsw
iOS 11.2.2 (iPod touch 6G):  iPodtouch_11.2.2_15C202_Restore.ipsw