Download iOS 17.2.1 (21C66) for iPhone 11

You will have to note that you can only restore signed IPSW firmware files using iTunes or 3utools.

❌ This IPSW firmware is not being Signed by Apple

Firmware Identifier iPhone12,1
iOS Version 17.2.1
Release Date 2023-12-19
Update Date 2023-12-16
Sha1sum
658e5a63e1adedcb43a2672f26f0b1751be55fff
Sha256sum
ff373763bb1fe50fb7a19a7f1084c217336a173da9a27afcb72092f13858e937
md5sum
6d68561cb7574f7b9d618b6fdd18697b
Size 6.81 GB
FileName
iPhone12,1_17.2.1_21C66_Restore.ipsw
Status

Download IPSW (6.81GB) Check device info
Release Notes

It should be noted that these are the official release notes for the from Apple

Phone

Messages

FaceTime

StandBy

Widgets

AirDrop

Keyboard

Safari and Passwords

Music

AirPlay

AirPods

Maps

Siri

Visual Look Up

Health

Privacy

Accessibility

This release also includes other features and improvements:

Some features may not be available for all regions or on all Apple devices. For more information, please visit this website:

https://www.apple.com/ios/ios-17

Some features may not be available for all regions or on all iPhone models. For information on the security content of Apple software updates, please visit this website:

https://support.apple.com/kb/HT201222