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 iPhone8,2
iOS Version 15.3
Release Date 2022-01-26
Update Date 2024-06-03
Sha1sum
2708a5b7bb1fbd38382ac4555a1b498acc342e5d
Sha256sum
bc2f911d4551f0fa6633b0b05f510da1e8b5e88ce6db69656cbb924bae1e0fae
md5sum
3a7e7b27037db236ed47556830ccdc22
Size 5.21 GB
FileName
iPhone_5.5_15.3_19D50_Restore.ipsw
Status

Download IPSW (5.21GB) 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