Download iOS 15.3 (19D50) for iPhone 12 Pro

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 iPhone13,3
iOS Version 15.3
Release Date 2022-01-26
Update Date 2022-01-23
Sha1sum
7c009b286389474cb141c3c7fcc9e1f173700d35
Sha256sum
8bc8c44dc1acafec354c0fd6dbc36df5b37c5353f65ed0fcb815604c33563afc
md5sum
f5cf13d35358f88faf401850a9673706
Size 6.36 GB
FileName
iPhone13,2,iPhone13,3_15.3_19D50_Restore.ipsw
Status

Download IPSW (6.36GB) 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