Posted by: Phat^Trance in iPhone News, Other Apple News
The iOS 4.0.1 Software Update improves the formula to determine how many bars of signal strength to display on iPhone 4, iPhone 3GS, and iPhone 3G. The real signal strength remains the same, but the bars on iPhone will indicate it more precisely. Download it from iTunes.
Note: This update will remove your jailbroken stuff so be careful updating if you have a jailbroken device!