Let's apply Occam's razor one final time:
Is it more likely that
A) Yes they missed something and the phone has a problem
B) It's absolutely perfect as Steve Jobs and Apple's marketing machine would prefer everyone believe
I'm gonna go with A on that one, Alex... without question it's easier to screw something up
and make a mistake than be absolutely perfect and without errors. The purpose of this thread was to point out what I believe is the basic design flaw: making the antenna part of the chassis which leads to potential skin-on-metal contact which is going to cause dramatic signal attenuation.
Look at Anand's test results if you want actual numbers. The fact that the iPhone 4 has the antenna as part of the body of the phone, when "Held Normally" in the hand as you can and typically do, causes
nearly double the level of signal attenuation of one competitive product
and nearly 10x the attenuation of the previous generation, the iPhone 3GS, is proof of this.
Go watch this video:
http://www.youtube.com/watch?v=znxQOPFg2mo
If you're not convinced there's a problem with the iPhone 4 in that demo, based on the fact that the iPhone 3GS is operating under the same RF-heavy overload conditions, then I can't do anything more to make it clearer. The iPhone 4 fails, the iPhone 3GS passes with flying colors. This footage is of course censored/deleted/missing from the "public" WWDC video at Apple.com, and a huge number of people have never seen it.
Simplest explanation for what Steve Jobs experiences in that demo?
The iPhone 4 he's trying to demo has a problem.
Since that skin-on-metal contact is a problem, they needed a quick down and dirty efficient solution since it was way way waaaayyyyy too late to start over again and alter the basic "flawed" design of the phone in the first place.
The simplest explanation for the existence of the Bumper is to prevent skin-on-metal contact.
It's not a very protective thing, honestly. Dropping the phone on the edge will basically transfer the kinetic energy through the Bumper to the chassis of the phone which, because of the different parts of the design - meaning the entire phone isn't like the unibody MacBook laptops - the potential still exists that when such a jarring impact happens, and that energy transfer takes place, it will make the glass front or back (which are "floating" on it) shift in place and then take that energy and transfer it across the surface, and throughout the construction.
Basically, I'm betting that having the Bumper on the phone would, to some degree, actually
increase the likelihood that damage occurs, especially shattered front or back panels.
Speculation? Somewhat, sure. Common sense, simple explanations? Absolutely. It's not rocket science...
