Download iOS 26.3 (23D127) for iPhone 15

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

✅ This IPSW firmware is Signed

Firmware Identifier iPhone15,4
iOS Version 26.3
Release Date 2026-02-11
Update Date 2026-02-07
Sha1sum
e39702c4f95728d8c988e478bb18cf2d9b13e7ef
Sha256sum
c9681dc915b28a8d7e4c45213b6eeecf91a782434d5ffef11139e777a8e9efcc
md5sum
8b38d694695736256fd128810dd3f75c
Size 9.45 GB
FileName
iPhone15,4_26.3_23D127_Restore.ipsw
Status

Download IPSW (9.45GB) Check device info
Release Notes

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

Design

Apple Intelligence

Camera

Photos

Phone

Messages

CarPlay

Maps

Music

Wallet

Apple Games

Protecting Kids Online

Accessibility

Other

For information on the security content of Apple software updates, please visit:

https://support.apple.com/100100

Some features may not be available in all regions or on all iPhone models. To learn more, please visit:

https://www.apple.com/ios/feature-availability/

Software updates, like this one, add new features and improvements that may affect performance and/or battery life. To learn more, please visit:

https://support.apple.com/125039

IPSW File Download FAQ