IPSW Downloads

iOS 8.1.2 - 12B440 for iPhone 4S

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

Release Date09 December 2014
Upload Date05 December 2014
File NameiPhone4,1_8.1.2_12B440_Restore.ipsw
File Size1.45 GB
SHA256sumb482f5749adf59d118ad5449d10db22e261a78d6f9d9f3677550a9371cff0ced
MD5sum39341750faab88b272fdfb7ac0316597
SHA1sum53fa0cf99b772736630555b00d6d0f92494a09d9
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_8.1.2_12B440_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_8.1.2_12B440_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_8.1.2_12B440_Restore.ipsw and press Enter.
  5. Wait for the restore to complete and for your iPhone 4S to reboot.