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iPhone 4[S]

iOS 9.3.6 (13G37) for iPhone 4[S]

✓ This firmware is signed. This means that you can restore to it in iTunes.

Your download should begin shortly. If it does not, you can download it directly here:

Download (1.61 GB)

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_9.3.6_13G37_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_9.3.6_13G37_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_9.3.6_13G37_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_9.3.6_13G37_Restore.ipsw -Algorithm SHA1
  3. The output of the command should match the following checksum: 6ccddbfdf4a0d6747924252d379ad6d52f7d4ea8. 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_9.3.6_13G37_Restore.ipsw
  3. The output of the command should match the following checksum: 6ccddbfdf4a0d6747924252d379ad6d52f7d4ea8. 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_9.3.6_13G37_Restore.ipsw
  3. The output of the command should match the following checksum: 6ccddbfdf4a0d6747924252d379ad6d52f7d4ea8. If it doesn't, you may need to redownload the file.

Checksums

SHA256sum 2466a99001c9e091e22f330a1c97a231179d1679f58fd9d1cf0c1694ca8261bd
MD5sum 26f4c6077e5f9beda57f100cda21e464
SHA1sum 6ccddbfdf4a0d6747924252d379ad6d52f7d4ea8
Please note, the documentation below is supplied from Apple's update servers. We don't modify the contents of this documentation.

iOS 9.3.6

iOS 9.3.6 addresses an issue that could impact GPS location performance and could cause system date and time to be incorrect. This update is recommended for all users.

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

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

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