Apple iPhone 11 Pro iOS 17.2.1 IPSW firmware
Apple iPhone 11 Pro
Not signed
iOS 17.2.1
Build 21C66 For iPhone12,3, D421AP
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
6.95 GB
Downloads from updates.cdn-apple.com.
File details
- Device
- Apple iPhone 11 Pro
- OS
- iOS 17.2.1
- Region
- Global
- Type
- IPSW
- Released
- Size
- 6.95 GB
- File name
iPhone12,3,iPhone12,5_17.2.1_21C66_Restore.ipsw- MD5
c4f1e21c276108c510c32be8291d04cb- SHA-1
6b0be6e23dedcf9c3f43b983a99102a383fed499- SHA-256
e135107807517e6f60202a26806cf7ea7ee625b1bbbb59d8b966414af0ff92a5
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: iPhone12,3, D421AP. 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