Apple iPhone 15 Pro iOS 17.3.1 firmware
Apple iPhone 15 Pro
Not signed
iOS 17.3.1
Build 21D61 For iPhone16,1, D83AP
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
7.57 GB
Downloads from updates.cdn-apple.com.
File details
- Device
- Apple iPhone 15 Pro
- OS
- iOS 17.3.1
- Region
- Global
- Type
- IPSW
- Released
- Size
- 7.57 GB
- File name
iPhone16,1_17.3.1_21D61_Restore.ipsw- MD5
959f093346a32d48e7d5716462fb22c8- SHA-1
2f7ba9e61ad11214988b405c21f9ef211315d463- SHA-256
5b4020427f1999e2712966af550bb140e6f1a6368d3ef3d4b165f52d35904231
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: iPhone16,1, D83AP. 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