Instead of revealing head-to-head voice quality on the two networks, Metrico compared the iPhone 4 on AT&T with 22 other smartphones sold by AT&T, noting that iPhone 4 ranked below average in Bluetooth speech quality behind the BlackBerry Torch and BlackBerry Curve. Overall call performance put the AT&T iPhone "in the middle of the pack" of the other smartphones and behind the Samsung Captivate and HTC Aria.
Metrico also compared the Verizon iPhone 4 to 17 other Verizon smartphones, putting it "near the top" in noise cancelling performance -- in the same group as the Motorola Droid X and LG Ally. The iPhone was average in speech quality on Verizon, behind top performers like the LG Fathom.
Metrico didn't publicly elaborate on many of its findings, including the actual average time for data. But it did say that speech quality tests were based on live and network tests, covering the handset, headset, speakerphone and Bluetooth modes.
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