Download iOS 15.2.1 (19C63) for iPhone 13

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 iPhone14,5
iOS Version 15.2.1
Release Date 2022-01-12
Update Date 2022-01-08
Sha1sum
a4bc7ddc03ba41a3bd588f109d1250c6cb0ab1cc
Sha256sum
75553fd7b3f0f94fbe656a3f8583a38e04b2e8c5a0f4a2d78d16697ab3e028a4
md5sum
d6dba1f75db85e863947283a8cc92fa9
Size 6.18 GB
FileName
iPhone14,5_15.2.1_19C63_Restore.ipsw
Status

Download IPSW (6.18GB) 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