Apple has released iOS 4.0.1 Software Update for iPhone, the first update to the iOS since the release of 4.0 on June 21. According to Apple’s release notes, the 4.0.1 Software Update “improves the formula to determine how many bars of signal strength to display.” Apple promised this fix in a press release earlier this month; it remains to be seen whether it also addresses the ongoing proximity sensor issue, as well. The iOS 4.0.1 Software Update for iPhone 3G, iPhone 3GS, and iPhone 4 is available now via the Update feature in iTunes.
Apple releases iOS 4.0.1 Software Update for iPhone

Charles Starrett
Charles Starrett was a senior editor at iLounge. He's been covering the iPod, iPhone, and iPad since their inception. He has written numerous articles and reviews, and his work has been featured in multiple publications.