The different timetables have been set as Apple does not want to repeat the mistake it made in 2013 when it launched the iPhone 5s and iPhone 5c simultaneously, said the sources. Yield rates have not been an issue for the large-size iPhone, as well as for the speculated iWatch, and therefore, member companies of the current iPhone supply chain will remain unaffected, the sources asserted.
Yesterday, it was reported that Apple is targeting a mid-September unveiling of the iPhone 6. It's currently unclear when and if the company plans to unveil a 5.5-inch device.
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