Apple Inc. said Friday that it was "stunned" to find that its iPhones have for years been using a "totally wrong" formula to determine how many bars of signal strength they are getting.
Apple said that's the reason behind widespread complaints from users that the latest model, iPhone 4, can show a sudden plunge in signal strength when they hold it in a way that covers a small black strip on one edge of the phone. Users online have jokingly called this the "death grip" for the phone.
That drop seems exaggerated because the phone can wrongly display four or five bars of signal strength when it shouldn't, Apple said.
"Their big drop in bars is because their high bars were never real in the first place," the company said in a letter to users.
I njoticed this on the 3GS as well. I assumed it was because the phone was flipping back and forth in this over-subscribed area.