IPSW Downloads

iPadOS 8.1.2 - 12B440 for iPad Air (WiFi)

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

Release Date09 December 2014
Upload Date05 December 2014
File NameiPad4,1_8.1.2_12B440_Restore.ipsw
File Size1.89 GB
SHA256suma7e9b019917be05fc60dabfc1368377b53e3dcb8b18f0504c19dffa14d02a9eb
MD5sum736f608c4b8a8e2b1e9229dcb402453a
SHA1sumaa8f669768e88d9dfa9ff7dc5e632860d8a1eb58
IdentifieriPad4,1

Installation Instructions

Windows

  1. Install the latest version of iTunes from the Microsoft Store.
  2. Connect your iPad Air (WiFi) to your PC.
  3. Open iTunes and navigate to your iPad Air (WiFi).
  4. Hold the Shift key and click "Restore".
  5. Select the iPad4,1_8.1.2_12B440_Restore.ipsw file you downloaded.
  6. Wait for the restore to complete and for your iPad Air (WiFi) to reboot.

macOS

  1. Connect your iPad Air (WiFi) to your Mac.
  2. Navigate to your iPad Air (WiFi) in Finder.
  3. Hold the Option or Alt key and click "Restore".
  4. Select the iPad4,1_8.1.2_12B440_Restore.ipsw file you downloaded.
  5. Wait for the restore to complete and for your iPad Air (WiFi) to reboot.

Linux

  1. Install idevicerestore.
  2. Connect your iPad Air (WiFi) 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 iPad4,1_8.1.2_12B440_Restore.ipsw and press Enter.
  5. Wait for the restore to complete and for your iPad Air (WiFi) to reboot.