Apple iPhone XS iOS 17.5.1 IPSW firmware
Apple iPhone XS
Not signed
iOS 17.5.1
Build 21F90 For iPhone11,2, D321AP
Global · IPSW
A newer version is available for this region: iOS 18.7.11
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
7.27 GB
Downloads from updates.cdn-apple.com.
File details
- Device
- Apple iPhone XS
- OS
- iOS 17.5.1
- Region
- Global
- Type
- IPSW
- Released
- Size
- 7.27 GB
- File name
iPhone11,2,iPhone11,4,iPhone11,6_17.5.1_21F90_Restore.ipsw- MD5
9a099d38f67e68f04a7ae1dd9ab6ce55- SHA-1
81b4899c48b079b5112f4958ccb8a61f24c789b1- SHA-256
7d7b7b30551530e4b95d3bdba9ac28e8a39ec1500bfe0674422cbfaabf68eb9e
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: iPhone11,2, D321AP. 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