We're likely headed into another long season of rumors about the new iPhone, with developers saying that there's evidence appearing in their app usage logs that Apple is testing a new iPhone 5S running iOS 7. As reported by The Next Web, developers are able to track which iPhone models and iOS versions are using their third-party apps, and the iPhone 5 uses the identifiers 5,1 and 5,2. However, they've been surprised to see an identifier of 6,1 in their logs. And the device is running iOS 7.