IPSW Downloads

iOS 26.5.1 - 23F81 for iPhone18,4

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

Release Date01 June 2026
Upload Date28 May 2026
File NameiPhone18,4_26.5.1_23F81_Restore.ipsw
File Size10.28 GB
SHA256sum5a5f57c78696d824de81f20f2ba4bf31125b3721ac55ddde5d65790897efef2d
MD5sumbe05ca2cb43131b1d653ee040d639d8e
SHA1sumd42f24d7cfb634bc7d636b1701c092ac8c684e79
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_26.5.1_23F81_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_26.5.1_23F81_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_26.5.1_23F81_Restore.ipsw and press Enter.
  5. Wait for the restore to complete and for your iPhone18,4 to reboot.