Apple's iPhone 3G shipped with the iPhone 2.0.0 operating system and runs firmware version 3.x with some limitations. On your computer, right-click the link below to download the official firmware restore file.
iPhone 3G firmware version 3.0.0 can be found here: iPhone1,2_3.0_7A341_Restore.ipsw
Apple's original iPhone (2G) shipped with the iPhone 1.0.0 operating system and runs firmware version 3.x with some limitations. On your computer, right-click the link below to download the official firmware restore file.
iPhone (2G) firmware version 3.0.0 can be found here: iPhone1,1_3.0_7A341_Restore.ipsw
Apple's original iPhone (2G) shipped with the iPhone 1.0.0 operating system and runs firmware version 2.x. On your computer, right-click the link below to download the official firmware restore file.
iPhone (2G) firmware version 2.0.0 can be found here: iPhone1,1_2.0_5A347_Restore.ipsw
Apple's original iPhone (2G) shipped with the iPhone 1.0.0 operating system. On your computer, right-click the link below to download the official firmware restore file.
iPhone (2G) firmware version 1.0.0 can be found here: iPhone1,1_1.0_1A543a_Restore.ipsw
From Apple CEO Steve Jobs himself, writing email on his iPhone:
"Sorry, no."
If you have an aluminum-backed iPhone, installing the iPhone 4 firmware update will not work. Presumably, the operating system is too advanced for the capabilities of the older hardware. Apple will not release any future updates for the original iPhone. The iPhone 2G is officially obsolete.
