Download iOS 4.3.1 for iPhone 3G[S] (iPhone2,1)

Signed IPSW files can be restored via iTunes, 3uTools. Unsigned IPSWs cannot currently be restored via iTunes, 3uTools.

Signed status can change daily, you should check signed status before restored

Firmware information
  • File name
  • Version
    iOS 4.3.1 This firmware is unsigned. You can not restore to it
  • Build ID
  • Size
  • Release date
  • Upload date
    2011-03-24 12:40:24
  • MD5
  • SHA1
  • SHA256
iPhone iPhone 3G[S] iPhone2,1
* Apple server is official from Apple. Other links are re-upload to other hosts.