Apple argued in a Beijing court on Wednesday that its iPhone 6 and iPhone 6 Plus mobile designs do not copy a Chinese product and should be allowed to be sold on the Chinese mainland.

Apple has been sued by owners of iPhone 6 and iPhone 6 Plus smartphones who say a design defect causes the phones' touchscreens to become unresponsive, making them unusable

Users in Apple's support forums have recently highlighted a rare issue that causes iPhones to crash, specifically for users with a large amount of apps installed.

The iPhone 6 will be sold in China from Oct 17, after rigorous regulator scrutiny led to Apple reassuring the Chinese government that the smartphones did not have security "backdoors" through which US agencies can access users' data.