iPhone 4 Signal Issue Can Be Fixed With a Software Update?
Despite the fact that today's release of iOS 4.0.1 addressed only the display of signal strength on the iPhone and not actual signal attenuation issues caused by touching the antenna in the side of the iPhone 4, a software fix may yet still b...
http://www.macrumors.com/2010/07/15/iphone-4-signal-issue-can-be-fixed-with-a-software-update/