Download iOS 13.3 (17C54) 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 13.3
Release Date 2019-12-10
Update Date 2019-12-05
Sha1sum
c952f378245489bf5e018acf332165ec37e086fb
Sha256sum
f5c30064108ef7fef5e4dea37e7c655e1bd2199d32cab10ec6e9e89e4ba82ed5
md5sum
a14940c3de6fcd8a79a802b1ed1660e1
Size 3.91 GB
FileName
iPhone_5.5_P3_13.3_17C54_Restore.ipsw
Status

Download IPSW (3.91GB) Check device info
Release Notes

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

iOS 13.3 includes improvements, bug fixes and additional parental controls for Screen Time.

Screen Time

Apple News

Stocks

This update also includes bug fixes and other improvements. This update:

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

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