iPhone 17 iPhone18,3

IPSW Unsigned 23D127

iOS 26.3

iOS

Version

26.3

Build ID

23D127

File Size

10.27 GB

Release Date

2026-02-11

Last Updated

2026-02-07

Download IPSW

Beta firmware? Download Here →

Want full hardware specs? View iPhone 17 specs →

About This Firmware

iOS 26.3 (build 23D127) is an official Apple IPSW for the iPhone 17, released on 2026-02-11. The file is served directly from Apple's CDN. This firmware is no longer signed by Apple. Standard downgrades are not possible, but the file remains available for reference and advanced use.

Verify the download using the SHA-256 or SHA-1 checksum listed in the Checksums section below.

Filename

iPhone18,3_26.3_23D127_Restore.ipsw

Checksums

SHA-256 dd2239ea08262fea7733bd1782ee50692f6eeea0e21ae7638fc8689c5e7fe567

SHA-1 5e4ab1907b488d3c6ab7bafd6b99116f3cf97a42

MD5 bfa677fc9a75d05bf5317901a72f62e0

Direct URL

https://updates.cdn-apple.com/2026WinterFCS/fullrestores/089-71645/C2713B5B-2752-4F35-A082-2963ED6DA5E3/iPhone18,3_26.3_23D127_Restore.ipsw

Other Devices

iPhone XS Max (China)

iPhone11,4

iPhone 15 Pro Max

iPhone16,2

How to Restore with This IPSW

iTunes / Finder

macOS & Windows

Download the .ipsw file to your computer.
Connect your iPhone 17 via USB.
Open iTunes (Windows / macOS Mojave and earlier) or Finder (macOS Catalina+) and select your device.
Update (keep data): hold Option (Mac) or Shift (Windows) and click Update, then pick the .ipsw file.
Restore (erase & install): hold Option / Shift and click Restore iPhone…, then pick the .ipsw file.
Wait for the process to finish - do not disconnect.

Restoring will erase all data on the device. Back up first.

3uTools

Windows

Download and install 3uTools from 3u.com.
Connect your iPhone 17 via USB and trust the computer on the device.
Go to Flash & JB → Easy Flash.
Click Import and select the downloaded .ipsw file.
Choose Flash mode: Update keeps data, Restore wipes the device.
Click Flash and wait for the progress bar to complete - do not disconnect.

Only flash firmware that matches your exact device model.

DFU Mode

Recovery tip

If your device is stuck in a boot loop or iTunes/Finder does not recognise it, enter DFU mode first, then select the .ipsw file as normal.

iPhone 8 / X and later

Quickly press & release Volume Up
Quickly press & release Volume Down
Hold Side button until screen goes black
Hold Side + Volume Down for 5 s
Release Side, hold Volume Down 5 more s
Black screen = DFU active

iPhone 7 / 7 Plus

Hold Sleep/Wake + Volume Down for 8 s
Release Sleep/Wake, keep holding Volume Down for 5 s
Black screen = DFU active

iPhone 6s and earlier

Hold Sleep/Wake + Home for 8 s
Release Sleep/Wake, keep holding Home for 5 s
Black screen = DFU active