Apple iPhone 16 Plus iOS 26.3.1 firmware
Apple iPhone 16 Plus
Not signed
iOS 26.3.1
Build 23D8133 For iPhone17,4, D48AP
Global · IPSW
A newer version is available for this region: iOS 27.2 beta 4
Apple no longer signs this version, so a normal restore with Finder or iTunes will fail. Use a signed version unless you know you need this one.
Download
10.1 GB
Downloads from updates.cdn-apple.com.
File details
- Device
- Apple iPhone 16 Plus
- OS
- iOS 26.3.1
- Region
- Global
- Type
- IPSW
- Released
- Size
- 10.1 GB
- File name
iPhone17,4_26.3.1_23D8133_Restore.ipsw- MD5
8aba15f538402bccf3c1da123f85686b- SHA-1
849e378e1daf2993db4b3285ae2cfb04c05a2b26- SHA-256
537210781068cb9386eb7925f675cec7dacc2857963a7b3117d832e678cadc48
After downloading, compare the checksum with the one above. If they differ, the file is incomplete — download it again.
Before you download
- Make sure your device’s model number is one of: iPhone17,4, D48AP. You will find it in Settings → About phone, or on the box.
- This file is for the Global region. Installing another region’s firmware can remove features or block updates.
- Apple devices can only restore versions marked “Signed”.
- Back up your photos, contacts and files first, and charge the battery above 50%.
How to install
Use Finder on a Mac or the Apple Devices app / iTunes on Windows to install an IPSW file. Apple only accepts versions it is still signing, so check the “Signed” label before you download.
Read the guide: How to restore an iPhone, iPad or iPod with an IPSW file