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iPad Air 4 (Cellular)

iPadOS 15.4.1 (19E258) for iPad Air 4 (Cellular)

✗ This firmware is not signed. This means you cannot restore to it in iTunes.

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✗ This firmware is not signed. This means you cannot restore to it in iTunes. The instructions below are included for reference only.

Windows

  1. Install the latest version of iTunes from the Microsoft Store.
  2. Plug your iPad Air 4 (Cellular) in to your PC.
  3. Open iTunes, and navigate to your iPad Air 4 (Cellular).
  4. Hold the Shift key on your keyboard, and press "Restore".
  5. Select the iPad_Fall_2020_15.4.1_19E258_Restore.ipsw file that you downloaded.
  6. Wait for the restore to complete, and the iPad Air 4 (Cellular) to reboot.

macOS

  1. Plug your iPad Air 4 (Cellular) in to your Mac.
  2. Navigate to your iPad Air 4 (Cellular) in Finder.
  3. Hold the Option or Alt key on your keyboard, and press "Restore".
  4. Select the iPad_Fall_2020_15.4.1_19E258_Restore.ipsw file that you downloaded.
  5. Wait for the restore to complete, and the iPad Air 4 (Cellular) to reboot.

Linux

  1. Install idevicerestore.
  2. Plug your iPad Air 4 (Cellular) in to your PC.
  3. Open a terminal, and navigate to the IPSW file that you downloaded, e.g. cd ~/Downloads
  4. To perform a full erase restore, type idevicerestore -e iPad_Fall_2020_15.4.1_19E258_Restore.ipsw and press enter.
  5. Wait for the restore to complete, and the iPad Air 4 (Cellular) to reboot.

Windows

  1. Open PowerShell, and navigate to the IPSW file that you downloaded, e.g. cd Downloads
  2. Type Get-FileHash iPad_Fall_2020_15.4.1_19E258_Restore.ipsw -Algorithm SHA1
  3. The output of the command should match the following checksum: f39b69cf250690c6e8f6373eb976ebbda7f70150. If it doesn't, you may need to redownload the file.

macOS

  1. Open a terminal, and navigate to the IPSW file that you downloaded, e.g. cd ~/Downloads
  2. Type openssl sha1 iPad_Fall_2020_15.4.1_19E258_Restore.ipsw
  3. The output of the command should match the following checksum: f39b69cf250690c6e8f6373eb976ebbda7f70150. If it doesn't, you may need to redownload the file.

Linux

  1. Open a terminal, and navigate to the IPSW file that you downloaded, e.g. cd ~/Downloads
  2. Type openssl sha1 iPad_Fall_2020_15.4.1_19E258_Restore.ipsw
  3. The output of the command should match the following checksum: f39b69cf250690c6e8f6373eb976ebbda7f70150. If it doesn't, you may need to redownload the file.

Checksums

SHA256sum f21ecbaf1369d766c78d68e93910f8d734d527a374663421c9e3234511177f8f
MD5sum cd55b6184217120f740bf3d0080ee052
SHA1sum f39b69cf250690c6e8f6373eb976ebbda7f70150
Please note, the documentation below is supplied from Apple's update servers. We don't modify the contents of this documentation.

This update includes the following bug fixes for your iPad:

  • Battery may drain more quickly than expected after updating to iPadOS 15.4
  • Braille devices may become unresponsive while navigating text or displaying an alert
  • Made for iPad hearing devices may lose connection within some third-party apps

For information on the security content of Apple software updates, please visit this website:

https://support.apple.com/kb/HT201222

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