"simply evolved over time?" Way to get it wrong, man. Look, everybody knows the handset shape has represented "phone" from the beginning of all cell phones. That's certain. Heck, using green is also something that came well before cell phones too.
But that's not the problem.
This is the iPhone dialer icon:
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This has the Palm OS dialer icon on a Centro:
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This is the webOS dialer icon:
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This has the original stock Android dialer icon (Samsung doesn't use the stock Android):
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Android 2.3:
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Android 4:
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Windows Phone 7:
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Windows Mobile:
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Different Windows Mobile:
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There are obviously tons of ways to design a phone dialer icon that makes sense. All those listed above are very unique and distinguishable. Heck, Palm even use to use the shape of the device it's running on as part of the icon. Very unique. Many of them even use different colors.
Apple's icon is different in that it's not a green handset. It's a white handset icon, on a green background. Who else up in that swath of phones has a white handset on a green background?:
Nobody. Not even Google. Got that? Not. Even. Google.
But Samsung made one.
But that's not a big deal. The big deal is that Samsung not only made a phone icon that's similar to Apple's, they made a crapton of more icons that are similar to Apple's.
Like seriously, look at the icons in the HTC G1 picture. Then look at a Samsung Captivate's icons. Then look at an iPhone 3G. You can't possibly deny that Samsung's icons look significantly more like Apple's than Google's.
As for the LG Optimus 4X HD P880 (man, that name is horrible), I have a feeling that if LG keeps that up, they'll be served the same lawsuit soon.