They were both on wifi. The problem on the 4 was likely caused by it supporting N, which is of course much better than 3GS's G but is more sensitive to the edge case of ~500 people in the same room as you running wireless base stations without bothering to set up channels properly.
I don't think a change to the antenna would affect how it behaves in the same room as its base station, anyway.
I don't think a change to the antenna would affect how it behaves in the same room as its base station, anyway.
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