Apple says there is nothing to see here: The problem with the iPhone 4s antenna isnt a problem, but just more of the same poorly-displayed signal strength that, the company recently discovered, also beset every previous generation of iPhone. But a bigger mystery remains: Even if there is no antenna problem per se, how did the iPhone 4s problem of falsely-positive signal strength pass Apples vaunted quality assurance process where the buck stops with none other than CEO Steve Jobs himself?
A scientist presented Wired.com with an intriguing theory that can be summed up as cleanliness is next to FAIL.
A post-doctoral biochemistry fellow at a leading American university claims that dampness and naturally-occurring salts on the hands of the general populace help them form a better connection with the iPhone 4s exposed antenna than the clean hands of testers in Apples sterile lab environment would have done.
The biochemist, who asked not to be identified, forwarded us a copy of an e-mail apparently sent to several people at Apple, including Steve Jobs, claiming that simple electrochemistry explains the problem, which drops calls and curtails data bandwidth when users hold the phone near the bottom so that the hand bridges the two sides of the antenna that runs along the side of the device.
Apple blamed the problem on a software glitch, but it appears to be hardware-related. Tests have shown that the iPhone 4s signal grows significantly weaker when held in certain ways.
Apples explanation for iPhone 4 signal reception problem is inaccurate at best, and disingenuous at worst, reads the e-mail. iPhone users are in some of the hottest and most humid parts of the country this summer, and have salty, damp hands especially at events such as baseball games, barbecues, or other outdoor activities. Having bare metal antennae purposely handled will absolutely short [circuit] the signal.
This problem will be difficult to reproduce in Apples labs, because the engineers are required to wash their hands before touching devices, which also strips off the natural hand electrolytes that are ever-present in the field on a hot day.
This would also explain why certain users experience the problem, while others who may have washed their hands more recently cant seem to replicate it.
A rubber case sold by Apple for $29 solves the problem by interrupting contact between the hand and the antenna, though Apple customer support has apparently been told not to offer them for free to complaining users. So, how should Apple address the issue, if this biochemist is right?
The company need not redesign the antenna, he says, but should add an electrically insulating organic hydrophobic layer atop the bare metal, such as the thin layer of plastic that encases soda cans.
If the problem can be solved by spraying a thin, dampness-blocking coating on the metal antenna, perhaps Apple could offer to apply it for free at its retail locations, which would sure beat a product recall. A group of iPhone 4 owners sued Apple and AT&T over the iPhone 4s signal issue, seeking class-action status for the lawsuit, which would apply any remedies to all U.S. purchasers.
Weve asked Apple whether it is examining this as a potential cause of the issue, and hope to have an update soon.*
source
http://m.wired.com/epicenter/2010/07/apples-clean-hands-may-have-dirtied-iphone-4-signal/all/1