iPhone 2G Firmwares
| Version | Build | Release date | Size | Signed | Jailbreak | Details |
|---|---|---|---|---|---|---|
| iOS 3.1.3 Latest | 7E18 | — | 227.28 MB | Unsigned | None | Details |
| iOS 3.1.2 | 7D11 | — | 240.82 MB | Unsigned | None | Details |
| iOS 3.1 | 7C144 | — | 240.84 MB | Unsigned | None | Details |
| iOS 3.0.1 | 7A400 | — | 229.30 MB | Unsigned | None | Details |
| iOS 3.0 | 7A341 | — | 229.26 MB | Unsigned | None | Details |
| iOS 2.2.1 | 5H11 | — | 245.66 MB | Unsigned | None | Details |
| iOS 2.2 | 5G77 | — | 245.64 MB | Unsigned | None | Details |
| iOS 2.1 | 5F136 | — | 230.95 MB | Unsigned | None | Details |
| iOS 2.0.2 | 5C1 | — | 241.84 MB | Unsigned | None | Details |
| iOS 2.0.1 | 5B108 | — | 242.28 MB | Unsigned | None | Details |
| iOS 2.0 | 5A347 | — | 218.17 MB | Unsigned | None | Details |
| iOS 1.1.4 | 4A102 | — | 162.07 MB | Unsigned | None | Details |
| iOS 1.1.3 | 4A93 | — | 162.08 MB | Unsigned | None | Details |
| iOS 1.1.2 | 3B48b | — | 160.15 MB | Unsigned | None | Details |
| iOS 1.1.1 | 3A109a | — | 152.27 MB | Unsigned | None | Details |
| iOS 1.0.2 | 1C28 | — | 91.20 MB | Unsigned | None | Details |
| iOS 1.0.1 | 1C25 | — | 91.20 MB | Unsigned | None | Details |
| iOS 1.0 | 1A543a | — | 91.18 MB | Unsigned | None | Details |
Only versions Apple is currently signing can actually be installed. Download links point directly to Apple's servers.