so you can update to firmware 6.1.2 Follow this .
Wondering where you can get all the iPhone firmware files from? Here?s the direct download links for all of the iPhone IPSW firmware files from version 3.0.0 on up through 4.1.0 for iPhone 2G, iPhone 3G, iPhone 3GS, and iPhone 4, 4S, or 5. Note that we are not hosting the files, they are direct links to Apple?s web servers.
To Download Go to this Link: