Our formula, in many instances, mistakenly displays 2 more bars than it should for a given signal strength. For example, we sometimes display 4 bars when we should be displaying as few as 2 bars.

Letter from Apple Regarding iPhone 4

I had predicted my iPhone’s signal-strength indicator on T-Mobile was being generous and it seems that may be the case. I figured it was a carrier mis-match since I wasn’t on AT&T. If only I had a place to post these predictions…