About This Firmware
iOS 12.3
(build 16F156) is an official Apple IPSW
for the iPhone 6s,
released on 2019-05-13.
The download is 2.96 GB and 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 checksums below.
Filename
iPhone_4.7_12.3_16F156_Restore.ipsw
Checksums
SHA-256
e1a1f663e73ffdd659676867bb8bcf9f1f993d3390e6fedd70fdf54e4ad5235d
SHA-1
ad243ce75b684183320f7ea339957abc745c332a
MD5
f089a7865e601e15f21b753eae04c05d
Direct URL
https://updates.cdn-apple.com/2019SpringFCS/fullrestores/041-61795/B8E4BB08-71E2-11E9-AF43-0B84412A1E9F/iPhone_4.7_12.3_16F156_Restore.ipsw
Other Devices
iPhone 15
iPhone15,4
iPhone 16 Plus
iPhone17,4
iPhone SE (3rd generation)
iPhone14,6
iPhone X (Global)
iPhone10,3
iPhone 11 Pro Max
iPhone12,5
iPhone 8 (Global)
iPhone10,1
How to Restore with This IPSW
iTunes / Finder
macOS & Windows- Download the .ipsw file to your computer.
- Connect your iPhone 6s 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 6s 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 tipIf 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