Iphone Firmware Direct download

If you are planning to restore your iphone here are some links to download the firmware files for your iphone.
First you need to know what kind of iphone do you have. Here are some commonly used iphone as of now,
Iphone 3g , Iphone 3gs , Iphone 4, and iphone 4s, The iphone 2g and the other older model iphones are not commonly used phone so, i'm not going to include the download link to this page.
Iphone also have a firmware version,

3.1.3 This is the old firmware of the iphone.
Here are the links for iphone firmware 3.1.3
Iphone 3g 3.1.3      Iphone 3gs 3.1.3 
Iphone 4 and iphone 4s doesnt have this firmware version

4.0 This version is available for iphone 4 ,iphone 3gs, and iphone 3g
Iphone 3g 4.0       Iphone 3gs 4.0    Iphone 4 4.0


4.2.1 This version is available for Iphone 3g,3gs,and iphone 4
Iphone 3g 4.2.1      Iphone 3gs 4.2.1       Iphone 4 4.2.1



4.3.5 This version is available for Iphone 3gs and iphone 4
Iphone 3gs 4.3.5      Iphone 4 4.3.5





5.1.1 This version is available for iphone 3gs, Iphone 4 and iphone 4s
Iphone 3gs 5.1.1      Iphone 4 5.1.1        Iphone 4s 5.1.1