Is Apple Ditching The iPhone 5C?

The iPhone 5C has not been as popular as Apple had anticipated, with Tim Took himself admitting that sales were lower than expected. Now, news has surfaced that in September two new iPhones will be released and at the same time the 5C will be ditched.
According to reports from the South China Morning Post, the iPhone 6 will sport a 4.7-inch screen and a second model will have one measuring 5.5-inches. There still seems to be uncertainty surrounding what the displays will be made from, with some sources saying Apple will use sapphire crystal, while others say the tech company can’t afford this toughened material.

The news that Apple will do away with the iPhone 5C, has also resulted in a rumour that the 5S will actually become the ‘cheaper handset’, being produced from cheaper materials.
The question is, if Apple make the 5S from cheaper materials, is it still a 5S or does it just then become a 5C without the colourful cases?
Either way this is just a rumour and so far nothing has been confirmed