Download iOS 17.2.1 (21C66) for iPhone 14 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 iPhone15,3
iOS Version 17.2.1
Release Date 2023-12-19
Update Date 2023-12-16
Sha1sum
636870f78995cb5aacd98a6e32f49b03c4035860
Sha256sum
956f4a84ba1de91e9fdb8c4c3f6f2ad5adbefcc4217be62f67a889381258379a
md5sum
ad77a9838c94d25fe94c3382d8d319e4
Size 7.36 GB
FileName
iPhone15,3_17.2.1_21C66_Restore.ipsw
Status

Download IPSW (7.36GB) 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