According to Steve (and others) you get a similar phenomenon with earlier iPhones, it's just that the "do not touch" zone is in a different place. So a case would help any of these phones.
The case helps the iPhone 4 because it prevents conductive contact between your skin and the antenna, right? Previous iPhones had no exposed antenna, yes? Or did they? If not, the case would not have made as big a difference.
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According to Steve (and others) you get a similar phenomenon with earlier iPhones, it's just that the "do not touch" zone is in a different place. So a case would help any of these phones.
The case helps the iPhone 4 because it prevents conductive contact between your skin and the antenna, right? Previous iPhones had no exposed antenna, yes? Or did they? If not, the case would not have made as big a difference.