Download iOS 12.1.3 (16D40) for iPhone XR

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 iPhone11,8
iOS Version 12.1.3
Release Date 2019-01-22
Update Date 2019-01-15
Sha1sum
d85a98c9028825d7bf13d1d899a066975983a229
Sha256sum
md5sum
39295c8f862a1c8c49838496d272c166
Size 3.17 GB
FileName
iPhone11,8_12.1.3_16D40_Restore.ipsw
Status

Download IPSW (3.17GB) Check device info
Release Notes

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

iOS 12.1.3 includes bug fixes for your iPhone or iPad. This update:

This release also includes bug fixes for HomePod. This update:

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

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