Download iOS 11.3.1 (15E302) for iPhone 8 (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 iPhone10,1
iOS Version 11.3.1
Release Date 2018-04-24
Update Date 2018-04-14
Sha1sum
00f8a05f2e1480e3f4d92932081a35d00b7980cd
Sha256sum
7cd5687b6c3a64fbb56dcd825f2f9d776a6ded05d3751b6dceab65cd2ca5329a
md5sum
47b9fac4b26de070852a57cbe89938b7
Size 2.71 GB
FileName
iPhone_4.7_P3_11.0_11.3.1_15E302_Restore.ipsw
Status

Download IPSW (2.71GB) Check device info
Release Notes

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

iOS 11.3.1 improves the security of your iPhone or iPad and addresses an issue where touch input was unresponsive on some iPhone 8 devices because they were serviced with non-genuine replacement displays.

Note: Non-genuine replacement displays may have compromised visual quality and may fail to work correctly. Apple-certified screen repairs are performed by trusted experts who use genuine Apple parts. See support.apple.com for more information.

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

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