TechnologyApple has just released iOS 4.01 as a free software update for all iPhone users. Continue to read more.
The free update promises to fix the antenna "death-grip" issue which is supposedly related to a math formula malfunction regarding the the display of the iPhone's service signal bars. It's still propagating in iTunes.
The iOS software update shows slightly changed signal bars with the first three being taller in size. In many places, users have noticed that their service appears to be 1-3 bars lower than before the change.