Download iOS 15.4.1 (19E258) 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 15.4.1
Release Date 2022-03-31
Update Date 2022-03-28
Sha1sum
d9917967e70d1a33fb23aa5e7b27e4ad7f7b059c
Sha256sum
ee464120076009ec01b29f18ff498f43e3b5e512235ff2cd25aede1f56939a4d
md5sum
9ec6911f3afc2459edc70e0a5c8da183
Size 6.31 GB
FileName
iPhone11,8,iPhone12,1_15.4.1_19E258_Restore.ipsw
Status

Download IPSW (6.31GB) Check device info
Release Notes

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

This update includes the following bug fixes for your iPhone:

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

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