Apple has finally acknowledged the problem of disappearing bars or diminishing signal strength when you hold the iPhone 4 in such a way that covers the black strip in the lower left corner of the metal band. Apple in a press release today called “Letter from Apple Regarding iPhone 4”, details its discovery of the reason for the dramatic drop in bars or signal strength and calls the discovery as “simple and surprising” and the mistake as “stunning”.

Steve Jobs just announced the all new generation iPhone called the iPhone 4 at Apple Worldwide Developers Conference(WWDC) 2010 today.