Actually Apple seemed to have biased the iPhone's display of bars to show 5 bars when the signal falls in the top 50% of the range. As Gruber noted, the expose

Actually Apple seemed to have biased the iPhone's display of bars to show 5 bars when the signal falls in the top 50% of the range. As Gruber noted, the exposed antenna in iPhone 4 highlighted the downside to that issue -- when you're near the floor of the 50% range, you suddenly go down in bars dramatically. So the fix is to make what was fake before, more accurate. Source (from Gruber): http://fscked.co.uk/post/754590440/this-infographic-hopefully-shows-that-im-not http://fscked.co.uk/post/754590440/this-infographic-hopefull...