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iPhone 4 Reception Problem Not Real, Software Fix Coming


The dramatic drop in signal strength being reported by iPhone 4 users when the phone is held in a certain way is not a real drop, but an indication you are in a weak signal area.

Some iPhone 4 users have reported a drop of 4 or 5 bars when the iPhone 4 is tightly held in a way which covers the black strip in the lower left corner of the metal band. There has been speculation that the drop is caused by a faulty antenna design.

In a letter addressed to iPhone 4 users, Apple says that a small drop in signal strength when a mobile phone is gripped is usual, not just in iPhone 4, but also in iPhone 3G and many Droid, Nokia and RIM phones.

The cause for the dramatic drop seen by some users of iPhone 4 "is both simple and surprising," the letter explains.

"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. 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. 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.

"To fix this, we are adopting AT&T's recently recommended formula for calculating how many bars to display for a given signal strength. 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. We are also making bars 1, 2 and 3 a bit taller so they will be easier to see.

"We will issue a free software update within a few weeks that incorporates the corrected formula. Since this mistake has been present since the original iPhone, this software update will also be available for the iPhone 3GS and iPhone 3G."

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