Download iOS 15.2.1 (19C63) 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 15.2.1
Release Date 2022-01-12
Update Date 2022-01-08
Sha1sum
e05c16e9f45b62b5432efba30e12ab87c3475860
Sha256sum
4f70021cea83a7c950f7134d576b8832114cb1f09bb03f1a0872720c8e90e81c
md5sum
2588d2a6448d35a4ee35b052fead1556
Size 6.50 GB
FileName
iPhone11,8,iPhone12,1_15.2.1_19C63_Restore.ipsw
Status

Download IPSW (6.50GB) Check device info
Release Notes

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

iOS 15.2.1 contains bug fixes for your iPhone including:

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

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