Apple decided to push iOS 4.0.1 update for iPhone users and you guessed: it’s just a minor update which introduces a new way of calculating the signal strength therefore iPhones will now display the signal bars in a more accurate way. According to Apple’s support web page, the new iOS 4.0.1 software update for iPhone comes with various fixes and improvements, including the following: “Improves the formula to determine how many bars of signal strength to display.” At the same time, Apple notes that “This update contains security content originally included in previous iOS Updates.”
Download iOS 4.0.1 from Below Links:-