The letter, however, did not address, why holding the iPhone 4 in a specific way might cause signal to drop when previously it was displaying normal levels of reception. The company said, "users observing a drop of several bars when they grip their iPhone in a certain way are most likely in an area with very weak signal strength, but they don’t know it because we are erroneously displaying 4 or 5 bars. Their big drop in bars is because their high bars were never real in the first place."