AT&T Tops Sprint, Verizon in iPhone 4S Speeds

If you desire fast speeds on the iPhone 4S, consider AT&T.

The Dallas-based mobile-phone giant outperforms its rivals, Sprint and Verizon Wireless, in download and upload speeds on the iPhone 4S, according to Metrico Wireless, a mobile device performance analytics firm that measured performance of the iPhone 4S on all three carrier networks.

Verizon Wireless, the biggest U.S. mobile operator based on subscribers, slightly led in another category of performance: call success rates, or as Metrico Wireless notes, “the ability to make and hold calls successfully.”

Other findings: “Sprint’s iPhone 4S performs better than the other carriers in live network voice quality on the uplink, while AT&T’s iPhone 4S takes the lead in live network voice quality on the downlink.”

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