iPhone 3G Firmwares
| Version | Build | Release date | Size | Signed | Jailbreak | Details |
|---|---|---|---|---|---|---|
| iOS 4.2.1 Latest | 8C148 | — | 322.89 MB | Signed | None | Details |
| iOS 4.1 | 8B117 | — | 308.17 MB | Signed | None | Details |
| iOS 4.0.2 | 8A400 | — | 305.38 MB | Unsigned | None | Details |
| iOS 4.0.1 | 8A306 | — | 305.40 MB | Unsigned | None | Details |
| iOS 4.0 | 8A293 | — | 292.09 MB | Unsigned | None | Details |
| iOS 3.1.3 | 7E18 | — | 228.06 MB | Unsigned | None | Details |
| iOS 3.1.2 | 7D11 | — | 241.60 MB | Unsigned | None | Details |
| iOS 3.1 | 7C144 | — | 241.62 MB | Unsigned | None | Details |
| iOS 3.0.1 | 7A400 | — | 230.10 MB | Unsigned | None | Details |
| iOS 3.0 | 7A341 | — | 230.05 MB | Unsigned | None | Details |
| iOS 2.2.1 | 5H11 | — | 246.39 MB | Unsigned | None | Details |
| iOS 2.2 | 5G77 | — | 246.37 MB | Unsigned | None | Details |
| iOS 2.1 | 5F136 | — | 237.79 MB | Unsigned | None | Details |
| iOS 2.0.2 | 5C1 | — | 248.68 MB | Unsigned | None | Details |
| iOS 2.0.1 | 5B108 | — | 249.12 MB | Unsigned | None | Details |
| iOS 2.0 | 5A347 | — | 225.03 MB | Unsigned | None | Details |
Only versions Apple is currently signing can actually be installed. Download links point directly to Apple's servers.