IPSW Downloads

iOS 26.3.1 - 23D8133 for iPhone18,4

This firmware is signed. This means that you can restore to it in iTunes.

Release Date04 March 2026
Upload Date01 March 2026
File NameiPhone18,4_26.3.1_23D8133_Restore.ipsw
File Size10.00 GB
SHA256sum0f06f20855a0d2452b5ecb1e0186ad539100b3906827cd2888aaa60942e873a3
MD5sum99e16b47aea60efa90d5e5766621ac87
SHA1sum5d138a0930f9ead4c45f42c851c5ece479e96830
IdentifieriPhone18,4

Installation Instructions

Windows

  1. Install the latest version of iTunes from the Microsoft Store.
  2. Connect your iPhone18,4 to your PC.
  3. Open iTunes and navigate to your iPhone18,4.
  4. Hold the Shift key and click "Restore".
  5. Select the iPhone18,4_26.3.1_23D8133_Restore.ipsw file you downloaded.
  6. Wait for the restore to complete and for your iPhone18,4 to reboot.

macOS

  1. Connect your iPhone18,4 to your Mac.
  2. Navigate to your iPhone18,4 in Finder.
  3. Hold the Option or Alt key and click "Restore".
  4. Select the iPhone18,4_26.3.1_23D8133_Restore.ipsw file you downloaded.
  5. Wait for the restore to complete and for your iPhone18,4 to reboot.

Linux

  1. Install idevicerestore.
  2. Connect your iPhone18,4 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 iPhone18,4_26.3.1_23D8133_Restore.ipsw and press Enter.
  5. Wait for the restore to complete and for your iPhone18,4 to reboot.