All signs point to a September date for Apple's launch of the next generation iPhone 15 series. Anticipation is rising with each passing day, where leaks in the last couple of weeks indicate substantial change to this year’s lineup of iPhones — including a dummy unit showing off the iPhone 15 Pro’s new USB-C port and Action button. Now there’s even more indication of an impending iPhone 15 launch in the form of on a report indicating that production is underway. That, along with a recently uncovered regulatory filing, suggests a September iPhone 15 announcement is very much on track….