IPSW Downloads

iOS 5.1 - 9B179 for iPhone 4S

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

Release DateInvalid Date
Upload Date29 February 2012
File NameiPhone4,1_5.1_9B179_Restore.ipsw
File Size0.78 GB
SHA256sum
MD5sumf005b1e168ebc99fd37384766f8b7779
SHA1sum73e56b97c2ab7924f22f1488e65983720a46b5c8
IdentifieriPhone4,1

Installation Instructions

Windows

  1. Install the latest version of iTunes from the Microsoft Store.
  2. Connect your iPhone 4S to your PC.
  3. Open iTunes and navigate to your iPhone 4S.
  4. Hold the Shift key and click "Restore".
  5. Select the iPhone4,1_5.1_9B179_Restore.ipsw file you downloaded.
  6. Wait for the restore to complete and for your iPhone 4S to reboot.

macOS

  1. Connect your iPhone 4S to your Mac.
  2. Navigate to your iPhone 4S in Finder.
  3. Hold the Option or Alt key and click "Restore".
  4. Select the iPhone4,1_5.1_9B179_Restore.ipsw file you downloaded.
  5. Wait for the restore to complete and for your iPhone 4S to reboot.

Linux

  1. Install idevicerestore.
  2. Connect your iPhone 4S 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 iPhone4,1_5.1_9B179_Restore.ipsw and press Enter.
  5. Wait for the restore to complete and for your iPhone 4S to reboot.