As Apple prepares to unveil the iPhone 6 and its much-rumored iWatch at its September 9 event, TechCrunch reports that the Cupertino company has once again booked a high amount of shipping space out of China. The company’s shipping volume is reportedly so high that it’s begun displacing competitors’ attempts at shipping during the fall. Competing manufacturers have apparently been told by shipping companies that they cannot fulfill their deadlines because they were being booked by a “very important customer”, which is likely to be Apple.

According to several sources, Apple has already begun flexing its supply chain muscles by shipping so many units of upcoming devices from its manufacturing facilities to sales outlets that it is causing delays for other manufacturers. Apple shipments via major concerns like FedEx and UPS are said to be ‘incredibly high’ for the holiday quarter, pointing to a massive number of iPhones and whatever other units Apple announces for the fall season incoming. The company is apparently flooding its channels with devices, causing shipments for other ‘top tier’ device makers to be delayed to make way for Apple products. One other manufacturer was reportedly told by shippers that they couldn’t meet some deadlines because they were booked up servicing a ‘very important customer’.