Download iOS 9.3.1 (13E238) for iPhone 5s (GSM)

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 iPhone6,1
iOS Version 9.3.1
Release Date 2016-03-31
Update Date 2016-03-30
Sha1sum
961165e9c833c325d68ef15392c82005392b4586
Sha256sum
3b43eb853f62eeb62bef6dc256275d11fbc8a2da6abe69e768d68c4fc32b1efa
md5sum
9a1c72f1728fe37e457743157b086961
Size 1.85 GB
FileName
iPhone6,1_9.3.1_13E238_Restore.ipsw
Status

Download IPSW (1.85GB) Check device info
Release Notes

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

Fixes an issue that caused apps to be unresponsive after tapping on links in Safari and other apps

For information on the security content of this update, please visit this website:

http://support.apple.com/kb/HT1222