Verizon’s iPhone has a different antenna design than the AT&T iPhone, 9to5 Mac just pointed out.
Probably this is just because Verizon’s network is built on a different type of wireless infrastructure than AT&T’s. Verizon is CDMA. AT&T is GSM.
But maybe it has to do with the whole iPhone 4 Antennagate that went down last summer.
Here’s the AT&T iPhone. Note the antenna slot at the top of the phone.
Here’s the Verizon iPhone. Note the extra antenna slot on the side:
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