Download iOS 13.3.1 (17D50) for iPhone SE

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 iPhone8,4
iOS Version 13.3.1
Release Date 2020-01-28
Update Date 2024-06-03
Sha1sum
ad73324ce0782b7ee78a5108c077666b2a73bb2d
Sha256sum
1a729516c86546519890e0e286b9e6efe77f956a5096df0bea066b651b663141
md5sum
ee2df9b7791f4e7e45d20118288fdf53
Size 3.42 GB
FileName
iPhone_4.0_64bit_13.3.1_17D50_Restore.ipsw
Status

Download IPSW (3.42GB) Check device info
Release Notes

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

iOS 13.3.1 includes bug fixes and improvements. This update:

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

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