Download iOS 8.0 (12A365) for iPhone 4[S]

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 iPhone4,1
iOS Version 8.0
Release Date 2014-09-17
Update Date 2014-09-09
Sha1sum
ad1634d28be520671612af513e9eff699e649f0b
Sha256sum
38a9d3bc27805d703868d43ee7c93170c06b3790d2494461de50662591ec3c13
md5sum
8972f2afe48991e818c8245a37a8be48
Size 1.62 GB
FileName
iPhone4,1_8.0_12A365_Restore.ipsw
Status

Download IPSW (1.62GB) 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