Apple\'s iPhone accounts for nearly half of all smartphone Web traffic in the United States and Canada, a study by a mobile ad network says. The report by Chitika found the various generations of the iPhone could claim 46 percent of data moving over data networks to smartphone users, TG Daily reported Thursday. Samsung was in second place as a brand with devices cumulatively racking up 15 percent of smartphone traffic, although that did not include the current Galaxy S3, which claimed 2 percent for itself since its introduction. But the single model champ was the iPhone 5, which with 3 percent surpassed the S III in web traffic only three weeks after it was launched. The iPhone 5\'s traffic figure was more than BlackBerry and Windows Phone devices combined, Chitika said.