Download iOS 11.4 (15F79) for iPhone 8 Plus (Global)

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 iPhone10,2
iOS Version 11.4
Release Date 2018-05-29
Update Date 2018-05-18
Sha1sum
b424df080797b216539cc47e6c67dca18da608cd
Sha256sum
4613961f3e4cb8b3df887fca671517eb0e111714623707ea75dee8adee41a39d
md5sum
4cb9e2aa3c545c4a10a0387d293b1365
Size 2.86 GB
FileName
iPhone_5.5_P3_11.0_11.4_15F79_Restore.ipsw
Status

Download IPSW (2.86GB) Check device info
Release Notes

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

iOS 11.4 includes AirPlay 2 multi-room audio, support for HomePod stereo pairs, and Messages in iCloud. This update also includes bug fixes and improvements.

AirPlay 2

HomePod stereo pair

Messages in iCloud

Other improvements and fixes

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

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