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iPhone 4[S]

iOS 8.1.3 (12B466) for iPhone 4[S]

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

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Download (1.56 GB)

✗ 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 iPhone 4[S] in to your PC.
  3. Open iTunes, and navigate to your iPhone 4[S].
  4. Hold the Shift key on your keyboard, and press "Restore".
  5. Select the iPhone4,1_8.1.3_12B466_Restore.ipsw file that you downloaded.
  6. Wait for the restore to complete, and the iPhone 4[S] to reboot.

macOS

  1. Plug your iPhone 4[S] in to your Mac.
  2. Navigate to your iPhone 4[S] in Finder.
  3. Hold the Option or Alt key on your keyboard, and press "Restore".
  4. Select the iPhone4,1_8.1.3_12B466_Restore.ipsw file that you downloaded.
  5. Wait for the restore to complete, and the iPhone 4[S] to reboot.

Linux

  1. Install idevicerestore.
  2. Plug your iPhone 4[S] 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 iPhone4,1_8.1.3_12B466_Restore.ipsw and press enter.
  5. Wait for the restore to complete, and the iPhone 4[S] to reboot.

Windows

  1. Open PowerShell, and navigate to the IPSW file that you downloaded, e.g. cd Downloads
  2. Type Get-FileHash iPhone4,1_8.1.3_12B466_Restore.ipsw -Algorithm SHA1
  3. The output of the command should match the following checksum: 44455be722f52301a10a19f2b9cb8ceedae79eab. 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 iPhone4,1_8.1.3_12B466_Restore.ipsw
  3. The output of the command should match the following checksum: 44455be722f52301a10a19f2b9cb8ceedae79eab. 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 iPhone4,1_8.1.3_12B466_Restore.ipsw
  3. The output of the command should match the following checksum: 44455be722f52301a10a19f2b9cb8ceedae79eab. If it doesn't, you may need to redownload the file.

Checksums

SHA256sum 4d79e173a61fc0c59eb8b8b45d8fc7c724275c5adf218d31173290832729cd5f
MD5sum 25bdbd88000ce5a138f640ae031e0a87
SHA1sum 44455be722f52301a10a19f2b9cb8ceedae79eab
Please note, the documentation below is supplied from Apple's update servers. We don't modify the contents of this documentation.

iOS 8.1.3

This release includes bug fixes, increased stability and performance improvements, including:

• Reduces the amount of storage required to perform a software update

• Fixes an issue that prevented some users from entering their Apple ID password for Messages and FaceTime

• Addresses an issue that caused Spotlight to stop displaying app results

• Fixes an issue which prevented multitasking gestures from working on iPad

• Adds new configuration options for education standardized testing

For information on the security content of this update, please visit this website:   

http://support.apple.com/kb/HT1222

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