IPSW Downloads

iOS 26.3.1 - 23D8133 for iPhone 15

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

Release Date04 March 2026
Upload Date01 March 2026
File NameiPhone15,4_26.3.1_23D8133_Restore.ipsw
File Size9.45 GB
SHA256sum864eab98814d3031fd7261383c2c6711b558a168984d26b370e1071cad163f1d
MD5suma7855ed5a885076e95c9f6f34cc5a213
SHA1sum20fded225621d86086c747676b0944b27963898b
IdentifieriPhone15,4

Installation Instructions

Windows

  1. Install the latest version of iTunes from the Microsoft Store.
  2. Connect your iPhone 15 to your PC.
  3. Open iTunes and navigate to your iPhone 15.
  4. Hold the Shift key and click "Restore".
  5. Select the iPhone15,4_26.3.1_23D8133_Restore.ipsw file you downloaded.
  6. Wait for the restore to complete and for your iPhone 15 to reboot.

macOS

  1. Connect your iPhone 15 to your Mac.
  2. Navigate to your iPhone 15 in Finder.
  3. Hold the Option or Alt key and click "Restore".
  4. Select the iPhone15,4_26.3.1_23D8133_Restore.ipsw file you downloaded.
  5. Wait for the restore to complete and for your iPhone 15 to reboot.

Linux

  1. Install idevicerestore.
  2. Connect your iPhone 15 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 iPhone15,4_26.3.1_23D8133_Restore.ipsw and press Enter.
  5. Wait for the restore to complete and for your iPhone 15 to reboot.