Reuters claims to have sources saying Apple is looking at making both a smaller and larger iPhone, as well as multiple color choices, to better compete with Samsung. The sources claim they might be considering a simple, $99 phone.

Apple is looking at introducing at least two bigger iPhones next year - one with a 4.7-inch screen and one with a 5.7-inch screen - said the sources, including those in the supply chain in Asia. They said suppliers have been approached with plans for the larger screens, but noted it is still unclear whether Apple will actually launch its flagship product in the larger sizes.

"They constantly change product specifications almost to the final moment, so you're not really sure whether this is the final prototype," said one person with direct knowledge of the matter.