4
Apple doesn't publish release notes for every release — none are available for iOS 4.1. Security fixes for this build are listed in Apple's security release notes.
Download iOS 4.1 for all compatible devices
Signed files can be restored right away. Unsigned builds are listed for archival and research purposes.
| Device | Identifier | Status | Download |
|---|---|---|---|
| iPhone 3G | iPhone1,2 | Signed | Download |
| iPhone 3GS | iPhone2,1 | Signed | Download |
| iPod touch 2G | iPod2,1 | Signed | Download |
| iPod touch 3 | iPod3,1 | Signed | Download |
| iPhone 4 (GSM) | iPhone3,1 | Unsigned | Download |
| iPod touch 4 | iPod4,1 | Unsigned | Download |
| iPod touch 4 | iPod4,1 | Unsigned | Download |