Download iOS 11.2.6 (15D100) for iPhone 8 Plus (GSM)

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 iPhone10,5
iOS Version 11.2.6
Release Date 2018-02-19
Update Date 2018-02-16
Sha1sum
a23efe406e8c396a9e47c6b5287f07287aae18c5
Sha256sum
cc90c0590dd7219e00c3f2eb1d34e20f522b00abecc8f5f688031643eca3c40c
md5sum
db2497d004db4ca78d0aa13d7015de51
Size 2.75 GB
FileName
iPhone_5.5_P3_11.0_11.2.6_15D100_Restore.ipsw
Status

Download IPSW (2.75GB) Check device info
Release Notes

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

iOS 11.2.6 includes bug fixes for your iPhone or iPad. This update:

For information on the security content of Apple software updates, please visit this website: https://support.apple.com/kb/HT201222