Here are the links to each version if iPhone firmware: iPhone 2g: 1.00, 1.01, 1.02, 1.1.1, 1.1.2, 1.1.3, 1.1.4, 2.0, 2.0.1, 2.0.2, 2.1, 2.2, 2.2.1, 3.0, 3.0.1, 3.1, 3.1.2, 3.1.3 iPhone 3g: 2.0, 2.0.1, 2.0.2, 2.1, 2.2, 2.2.1, 3.0, 3.0.1, 3.1, 3.1.2, 3.1.3, 4.0 iPhone 3gs: 3.0, 3.0.1, 3.1, 3.1.2, 3.1.3, 4.0 iPhone4: 4.0 iPod: