Half of smartphone Web traffic in the US comes from the iPhone, according to a report from AdMob Mobile Metrics. The release of the iPhone 3G last July caused the use of Apple’s smartphone to jump dramatically. In August of last year, iPhones accounted for only 10 percent of smartphone Web traffic. Six months later, it's 50 percent. Wow.

With the iPhone’s jump, Blackberry, Windows Mobile and Palm have all taken big hits.

Android, which Gartner expects will actually surpass the iPhone in sales by 2012, is the only other phone whose Internet traffic has grown in the last six months. Android now accounts for five percent of the US smartphone market.

The top smartphones in America are the iPhone, BlackBerry Curve, BlackBerry Pearl, Palm Centro, and HTC Dream (G1). Worldwide, they are the iPhone, Nokia N70, BlackBerry 8300, Nokia N80, and Nokia N73

Worldwide, the iPhone claims 33 percent of smartphone traffic. The rest of the top-ten list is dominated by Nokia, which has six phones of the remaining phones. Because of the overwhelming presence of Nokia phones, Symbian remains the most-used operating system, beating out Apple's OS.

One-third of global internet traffic is now generated by smartphones, a seven-percent six-month increase.

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By Mark Alvarez