A pair of reports from earlier this week suggested that Apple (AAPL) plans to launch its iPhone 5S this coming August, and now a new report states that production of the next-generation Apple smartphone is currently underway. Macotakara, which has reported accurate details of unreleased Apple devices in the past, claims that Apple’s manufacturing partner Foxconn has completed test runs of the iPhone 5S and is now prepared to ramp up manufacturing. The report also notes that leading Japanese wireless carrier NTT DoCoMo may finally begin selling the iPhone this fall.