Download iOS 15.3 (19D50) for iPhone 12 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 iPhone13,4
iOS Version 15.3
Release Date 2022-01-26
Update Date 2024-06-03
Sha1sum
1643857c6faae9db1ae4bd5d4fd5d935c4f5e06d
Sha256sum
bc628b622eec77060b3199bb160b6a15e7dfa0455dbc2cf42f1552305a288a8e
md5sum
9a00a99d035ac37a0b338400849048f1
Size 6.18 GB
FileName
iPhone13,4_15.3_19D50_Restore.ipsw
Status

Download IPSW (6.18GB) Check device info
Release Notes

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

iOS 15.3 includes bug fixes and security updates for your iPhone and is recommended for all users.

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

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