Where can I download iOS 5.x firmware files for the iPhone 4S?
The iPhone 4S was initially launched on October 14, 2011 with iOS 5.0 installed. Use the links below to download iPhone 4S firmware (IPSW) files to your computer.
iPhone 4S iOS 5.0: iPhone4,1_5.0_9A334_Restore.ipsw
iPhone 4S iOS 5.0.1 (build 9A405): iPhone4,1_5.0.1_9A405_Restore.ipsw
iPhone 4S iOS 5.0.1 (build 9A406): iPhone4,1_5.0.1_9A406_Restore.ipsw
iPhone 4S iOS 5.1.0: iPhone4,1_5.1_9B179_Restore.ipsw
iPhone 4S iOS 5.1.1: iPhone4,1_5.1.1_9B206_Restore.ipsw
iOS 5.0.1 was released in two versions, build 9A405 and 9A406. Click here for more information about the difference between the 9A405 and 9A406 builds of iOS 5.0.1 on the iPhone 4S.