Two of the three major mobile providers in Germany are said to be preparing for an iPhone 6s launch on Friday, September 18, reports German Apple news site Macerkopf [Google Translate]. Carriers expect the iPhone 6s to be available for purchase beginning on that date, which is in line with previous rumors and past launch timelines.

Earlier this month, BuzzFeed's John Packzkowski, who has reliably predicted several Apple event dates in the past, said Apple would hold its iPhone 6s launch event on Wednesday, September 9. After launch events, Apple typically accepts pre-orders on the Friday of the event week, before starting to ship orders on the following week.

If Apple accepts iPhone 6s pre-orders, we can expect them to become available beginning on September 11, with the iPhone then shipping out to customers on September 18, as cited by German carriers. It is not yet clear if Apple will be allowing pre-orders for the iPhone 6s and 6s Plus.

For the iPhone 6, Apple introduced the device on Tuesday, September 9, began accepting pre-orders on Friday, September 12, and then launched the device on Friday, September 19. It appears the iPhone 6s will follow a very similar launch timeline.

As for iOS 9, Apple often releases the operating system a few days before the iPhone becomes available, suggesting we could see a public launch on Wednesday, September 16.

Apple's iPhone 6s and 6s Plus are expected to include an A9 processor, 2GB RAM, Force Touch capabilities, and an improved camera. While the devices will be the same size as the iPhone 6 and 6 Plus, there may be a small increase in thickness and height to accommodate Force Touch and internal material and structural changes designed to make the devices less prone to bending.