In advance of Apple's [3] earnings announcement later today, both major carriers in the U.S. have shown strong iPhone sales and activation performances in the last few months. Verizon went first [4], revealing last week that it sold 2.7 million iPhones [5] in the batch of 5.9 million smartphones sold in total in Q2. Today, AT&T revealed its latest quarterly earnings report [6], also listing a bumper crop of iPhone sales this last few months. 3.7 million activations of 5.1 million smartphones--over 70 percent of its smartphones sold in total--were iPhones, AT&T says. 

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