has released a minor update iOS 4.01 to improve the display of signal strength on the iPhone devices because of the hugely criticized for the signal reception issues.The update also includes some bug fixes and improvements.
iOS 4.01 is available for iPhone 3GS and iPhone 4 users and The iPhone 3G users can also download this firmware but you will not have all the features like Multitasking and Wallpapers.

you can try iOS 4.01 on older devices like the ipod otuch 2G,ipod touch 3G or older versions of the Iphone . All users can download the update from iTunes 9.2. Connect your iPhone to the iTunes to download and install the iOS 4.01 firmware. or also you can have a direct download links .
Download iOS 4.01 Firmware
Apple is going to address a special iPhone 4 conference today to give more information on the recent issues. So stay tuned for more news and updates.
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