Apple has released the iOS 4.0.1 for iPhone 4, 3GS, 3G and iPod Touch 3G, 2G to fix the reception issue.It is now available for download. You can download iOS 4.0.1 from the links below.
iOS 4.0.1 is fully supported on iPhone 4 and iPhone 3GS. iPhone 3G is also supported but the users are officially unable to do multitasking and wallpapers unless you know where to look for it. An iPad version of iOS 4 is also expected to be released by fall 2010.
To update to iOS 4.0.1 for iPhone, all you need to do is to connect your iPhone with your computer via USB and start iTunes. You should now see a message as shown below. Simply click on “Download and Install” button to get on to the new iOS 4.0.1 firmware.
WARNING: All the jailbreakers and unlocker MUST stay away from iOS 4.0.1 until further notice.
Download iOS 4.0.1 Firmware
You can download iOS 4.0.1 firmware (IPSW files) for iPhone 4, iPhone 3GS and iPhone 3G from the links below:
Download iOS 4.1 for iPhone 4
Download iOS 4.1 for iPhone 3GS
Download iOS 4.1 for iPhone 3G