Researchers for Strategy Analytics claim that the iPhone could become the best-selling handset in the US within the next six months. In addition, the handset has already become the best selling device for AT&T, according to reports. “The iPhone has become AT&T’s top selling device, commanding some 13 per cent of AT&T’s overall handset sales, and the fourth top selling handset in the US market,” said Barry Gilbert, vice president of the Strategy Analytics BuyerTRAX programs. “Although the iPhone hasn’t had an expansionary impact in the market, the iPhone has quickly assumed a leading market share position and raised the ante for smart devices. The sales trajectory we are observing with the iPhone could make it the top selling device in the US over the next 1-2 quarters.” The current best-selling handset, the Motorola RAZR V3, has seen its lead diminished recently, according to Strategy Analytics.