Download iOS 13.3 (17C54) for iPhone 11

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 iPhone12,1
iOS Version 13.3
Release Date 2019-12-10
Update Date 2019-12-05
Sha1sum
1c42e17f735f6fca611f86e5efe8771ed361b47a
Sha256sum
53bd9490e006ead51160ddc41ae9d6aceabca91a2361c93b00963a2b025144ed
md5sum
ad406739c56507e219b96ee51c76a4fe
Size 4.20 GB
FileName
iPhone11,8,iPhone12,1_13.3_17C54_Restore.ipsw
Status

Download IPSW (4.20GB) 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