iOS 4.2.8 (8E401) for iPhone 4 (CDMA)

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iPhone 4 (CDMA)

✗ This firmware is not signed. This means you cannot restore to it in Finder, the Apple Devices app, iTunes, or idevicerestore.

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

Download (653 MiB)

This firmware is not signed. This means you cannot restore to it in Finder, the Apple Devices app, iTunes, or idevicerestore. The instructions below are included for reference only.

Windows

  1. Install the latest version of Apple Devices from the Microsoft Store.
  2. Plug your iPhone 4 (CDMA) in to your PC.
  3. Open Apple Devices, and navigate to your iPhone 4 (CDMA).
  4. Hold the Shift key on your keyboard, and press "Restore".
  5. Select the iPhone3,3_4.2.8_8E401_Restore.ipsw file that you downloaded.
  6. Wait for the restore to complete, and the iPhone 4 (CDMA) to reboot.

macOS

  1. Plug your iPhone 4 (CDMA) in to your Mac.
  2. Navigate to your iPhone 4 (CDMA) in Finder.
  3. Hold the Option or Alt key on your keyboard, and press "Restore".
  4. Select the iPhone3,3_4.2.8_8E401_Restore.ipsw file that you downloaded.
  5. Wait for the restore to complete, and the iPhone 4 (CDMA) to reboot.

Linux

  1. Install idevicerestore.
  2. Plug your iPhone 4 (CDMA) 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 iPhone3,3_4.2.8_8E401_Restore.ipsw and press enter.
  5. Wait for the restore to complete, and the iPhone 4 (CDMA) to reboot.

Windows

  1. Open PowerShell, and navigate to the IPSW file that you downloaded, e.g. cd Downloads
  2. Type Get-FileHash iPhone3,3_4.2.8_8E401_Restore.ipsw -Algorithm SHA1
  3. The output of the command should match the following checksum: d4ff1e878166d74cc6b330f2b7167c6f6b07a1b5. 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 iPhone3,3_4.2.8_8E401_Restore.ipsw
  3. The output of the command should match the following checksum: d4ff1e878166d74cc6b330f2b7167c6f6b07a1b5. 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 iPhone3,3_4.2.8_8E401_Restore.ipsw
  3. The output of the command should match the following checksum: d4ff1e878166d74cc6b330f2b7167c6f6b07a1b5. If it doesn't, you may need to redownload the file.

Checksums

SHA1sumd4ff1e878166d74cc6b330f2b7167c6f6b07a1b5
Please note, the documentation below is supplied from Apple's update servers. We don't modify the contents of this documentation.

iOS 4.2.8 Software Update

This update contains changes to the iOS crowd-sourced location database cache including:

- Reduces the size of the cache   

- No longer backs the cache up to iTunes

- Deletes the cache entirely when Location Services is turned off

Products compatible with this software update:

• iPhone 4 (CDMA model)

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