It starts at US$99 with a contract in the US.Shoppers lined up at Apple Stores in New York, Munich, Tokyo and other cities, with some waiting for days to get their hands on the new models.The gold version emerged as the hottest seller, and AT&T Inc, Sprint Corp, T-Mobile US Inc and Verizon Wireless will not be able to ship gold iPhones until next month, while the others are available this month, A