Download iOS 9.3.4 (13G35) 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 9.3.4
Release Date 2016-08-04
Update Date 2016-08-01
Sha1sum
08086584704bf755a6124407df4db8d97f4d6bc2
Sha256sum
589951bbd355c20e48a2c8119301d0ae30925db73bdf8c72b1e9d876714403bd
md5sum
b4d49bfb50b439a91392d8f59805c2b5
Size 1.50 GB
FileName
iPhone4,1_9.3.4_13G35_Restore.ipsw
Status

Download IPSW (1.50GB) Check device info
Release Notes

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

iOS 9.3.4 provides an important security update for your iPhone or iPad and is recommended for all users.

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

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