Download iOS 13.3.1 (17D50) for iPhone 8 (Global)

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 iPhone10,1
iOS Version 13.3.1
Release Date 2020-01-28
Update Date 2024-06-03
Sha1sum
75e89db5e92c1fb1b1f0b572e14bac14d7bdf311
Sha256sum
3bae67e44b80301175dc704093f8e00f58c336d67ea4d9721d8a237c33adbcfa
md5sum
29378b2a98c1fb17a4091061f2f91265
Size 3.73 GB
FileName
iPhone_4.7_P3_13.3.1_17D50_Restore.ipsw
Status

Download IPSW (3.73GB) 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