IPSW Downloads

iOS 5.1 - 9B176 for iPhone 4 CDMA

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

Release DateInvalid Date
Upload Date29 February 2012
File NameiPhone3,3_5.1_9B176_Restore.ipsw
File Size0.77 GB
SHA256sum
MD5sum304a0863e83aff0f88215e3f6a193002
SHA1sum10c8f960e2f2b2c2bc29a49ccc8d020710cde3df
IdentifieriPhone3,3

Installation Instructions

Windows

  1. Install the latest version of iTunes from the Microsoft Store.
  2. Connect your iPhone 4 CDMA to your PC.
  3. Open iTunes and navigate to your iPhone 4 CDMA.
  4. Hold the Shift key and click "Restore".
  5. Select the iPhone3,3_5.1_9B176_Restore.ipsw file you downloaded.
  6. Wait for the restore to complete and for your iPhone 4 CDMA to reboot.

macOS

  1. Connect your iPhone 4 CDMA to your Mac.
  2. Navigate to your iPhone 4 CDMA in Finder.
  3. Hold the Option or Alt key and click "Restore".
  4. Select the iPhone3,3_5.1_9B176_Restore.ipsw file you downloaded.
  5. Wait for the restore to complete and for your iPhone 4 CDMA to reboot.

Linux

  1. Install idevicerestore.
  2. Connect your iPhone 4 CDMA to your PC.
  3. Open a terminal and navigate to the IPSW file you downloaded, e.g., cd ~/Downloads.
  4. To perform a full erase restore, type idevicerestore -e iPhone3,3_5.1_9B176_Restore.ipsw and press Enter.
  5. Wait for the restore to complete and for your iPhone 4 CDMA to reboot.