iOS 4.0.1 Firmware Update for iPhone available for download

Apple has released iOS 4.0.1 firmware update for iPhone. The new software update contains bug fixes and improvements, including the improvement of the formula to determine how many bars of signal strength to display.

iOS 4.0.1 Firmware Update is compatible with iPhone 3G/3GS, and iPhone 4. You can download it by connecting your iPhone to your computer, launch iTunes, and press the button to check for updates.