Download iOS 15.3 (19D50) for iPhone 6s

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 iPhone8,1
iOS Version 15.3
Release Date 2022-01-26
Update Date 2024-06-03
Sha1sum
d1995830d3deb7132827d67b0eb609c46d03d181
Sha256sum
15f83a463a171991b1c7e7bd0695c6aef10bc8a91614d3330fe7c19c340c699a
md5sum
b92121cf824ba8957e7366a648a044d7
Size 5.07 GB
FileName
iPhone_4.7_15.3_19D50_Restore.ipsw
Status

Download IPSW (5.07GB) 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