Download iOS 13.3.1 (17D50) 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 13.3.1
Release Date 2020-01-28
Update Date 2024-06-03
Sha1sum
52df6abf22e27c9318be0f95229af2fbae70b649
Sha256sum
157b0f93ffe03b457408a6c2149370a44bd5f7eb7db0ac2939f5b56b8382021a
md5sum
f523700a1ddfd6baa800a34b0f32825f
Size 3.90 GB
FileName
iPhone_5.5_P3_13.3.1_17D50_Restore.ipsw
Status

Download IPSW (3.90GB) Check device info
Release Notes

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

iOS 13.3.1 includes bug fixes and improvements. This update:

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

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