“Upon investigation, we were stunned to find that the formula we use to calculate how many bars of signal strength to display is totally wrong,” the company wrote in a letter, as reported by Digital Media Wire. “Our formula, in many instances, mistakenly displays 2 more bars than it should for a given signal strength.”
That’s a pretty big difference in signal strength, and it’s surprising that it took Apple this long to realize their error. It has been wrong since the iPhone first launched.
“The real signal strength remains the same, but the iPhone’s bars will report it far more accurately, providing users a much better indication of the reception they will get in a given area,” Apple continued.
Apple said that the updated formula should be pushed through a software update in the coming weeks.