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The unveiling of the iPhone 5 in just one week (at an event Sept. 12 with a presumed release-date announcement) comes none too soon. Apple's iconic smartphone is taking its licks from the summer's hottest device – the Samsung Galaxy S III.

Peruse our image gallery for a look at the top three smartphones at each of America's Top 4 operators in August to see how the iPhone and the Galaxy S III fared against each other and versus their competitors.

Rankings come via retail checks made by analysts at Canaccord Genuity.