A young woman was in tears after police kicked her out of the queue to Apple's flagship Sydney store before she was able to buy the new iPhone 6.

Anna, a 24-year-old international student from China, was ordered by police about 10am to leave the George Street area for six hours or risk being arrested, after they asked her multiple times to stay put in the queue.

Two models of the new smartphone, the iPhone 6 and iPhone 6 Plus, went on sale at 8am AEST at Apple stores across the country, as well as other retailers such as Telstra, Optus and Vodafone.