Download iOS 17.2.1 (21C66) for iPhone 11 Pro Max

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 iPhone12,5
iOS Version 17.2.1
Release Date 2023-12-19
Update Date 2023-12-16
Sha1sum
6b0be6e23dedcf9c3f43b983a99102a383fed499
Sha256sum
e135107807517e6f60202a26806cf7ea7ee625b1bbbb59d8b966414af0ff92a5
md5sum
c4f1e21c276108c510c32be8291d04cb
Size 6.95 GB
FileName
iPhone12,3,iPhone12,5_17.2.1_21C66_Restore.ipsw
Status

Download IPSW (6.95GB) 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