IPSW Downloads

iOS 17.2.1 - 21C66 for iPhone 11

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

Release Date19 December 2023
Upload Date16 December 2023
File NameiPhone12,1_17.2.1_21C66_Restore.ipsw
File Size6.81 GB
SHA256sumff373763bb1fe50fb7a19a7f1084c217336a173da9a27afcb72092f13858e937
MD5sum6d68561cb7574f7b9d618b6fdd18697b
SHA1sum658e5a63e1adedcb43a2672f26f0b1751be55fff
IdentifieriPhone12,1

Installation Instructions

Windows

  1. Install the latest version of iTunes from the Microsoft Store.
  2. Connect your iPhone 11 to your PC.
  3. Open iTunes and navigate to your iPhone 11.
  4. Hold the Shift key and click "Restore".
  5. Select the iPhone12,1_17.2.1_21C66_Restore.ipsw file you downloaded.
  6. Wait for the restore to complete and for your iPhone 11 to reboot.

macOS

  1. Connect your iPhone 11 to your Mac.
  2. Navigate to your iPhone 11 in Finder.
  3. Hold the Option or Alt key and click "Restore".
  4. Select the iPhone12,1_17.2.1_21C66_Restore.ipsw file you downloaded.
  5. Wait for the restore to complete and for your iPhone 11 to reboot.

Linux

  1. Install idevicerestore.
  2. Connect your iPhone 11 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 iPhone12,1_17.2.1_21C66_Restore.ipsw and press Enter.
  5. Wait for the restore to complete and for your iPhone 11 to reboot.