It seems it's not just the iPhone that will see an uptick in screen size.

According to Bloomberg, citing people "with knowledge of the matter," Apple's suppliers are working on a version of the iPad with a 12.9-inch screen. Production of the tablet will start by the first quarter of next year.

Apple makes the iPad mini with a 7.9-inch screen and the iPad Air with a 9.7-inch screen.

Although the reported device would be the biggest iPad ever developed by Apple, the idea of a 12-inch tablet isn't new. Microsoft's Surface Pro 3, announced in May, features a 12-inch screen.

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