The new version of the iPhone’s firmware, version 1.1.1 was released this past week. It brought with it numerous bug fixes, access to the wireless iTunes store, and several new features. For those who have ATT’s service with the iPhone (those who do not have unlocked phones), and those who have not in any other way hacked their phones, software upgrades are always important. However if you have altered your iPhone in any way, whether it be using the program Installer.app or unlocking your iPhone to operate with a carrier other than ATT, you will make your iPhone inoperable if you attempt to update your iPhone to the latest version 1.1.1. (Your iPhone will only stop working if it has been unlocked, you will only lose your install.app and 3rd party apps if your iPhone is not unlocked) Currently there is no way to bring back your iPhone if it has been bricked as a result of updating it.