Download iOS 8.0 (12A365) 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 8.0
Release Date 2014-09-17
Update Date 2014-09-09
Sha1sum
a1fdf212c4cd705bc5c81c5e79b98f951206a298
Sha256sum
144ce6d5ca7b4502b9073b8743630ec0514c05d10379e0b4253bafa94b6c3b09
md5sum
799c605b7dcb40da31ed3a12e38c9436
Size 1.91 GB
FileName
iPhone6,1_8.0_12A365_Restore.ipsw
Status

Download IPSW (1.91GB) Check device info
Release Notes

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

This update contains hundreds of new features, including the following:

Some features may not be available for all countries or all areas.

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

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