Apple iPhone 11 iOS 17.3.1 IPSW firmware
Apple iPhone 11
Not signed
iOS 17.3.1
Build 21D61 For iPhone12,1, N104AP
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
6.81 GB
Downloads from updates.cdn-apple.com.
File details
- Device
- Apple iPhone 11
- OS
- iOS 17.3.1
- Region
- Global
- Type
- IPSW
- Released
- Size
- 6.81 GB
- File name
iPhone12,1_17.3.1_21D61_Restore.ipsw- MD5
bd49d082fdfb94e20d497f01815fcb85- SHA-1
6bdc13146782ec9c483a12abd1c9230fa658b88b- SHA-256
17ae5fc4d50912fd10970410819ee535504c7744d29426206c5073c192e47a5b
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: iPhone12,1, N104AP. 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