3
Apple doesn't publish release notes for every release — none are available for iOS 3.1.3. Security fixes for this build are listed in Apple's security release notes.
Download iOS 3.1.3 for all compatible devices
This build is no longer signed. Files are listed for archival and research purposes.
| Device | Identifier | Status | Download |
|---|---|---|---|
| iPhone 2G | iPhone1,1 | Unsigned | Download |
| iPhone 3G | iPhone1,2 | Unsigned | Download |
| iPhone 3GS | iPhone2,1 | Unsigned | Download |
| iPod touch 3 | iPod3,1 | Unsigned | Download |