updated 10:57 am EDT, Tue May 27, 2014
Date most likely informed guess
Support workers for German carrier Deutsche Telekom are attempting to get some people to stay with the claim that the next-generation iPhone will ship on September 19, local reports say. Apple hasn't revealed the phone yet, and it's doubtful that the company would be giving carriers an exact date at this stage. It is a possibility however, and if nothing else the date is consistent with the launches of the iPhone 5s and 5c -- which took place on September 20 last year -- and the iPhone 5, which shipped on September 21, 2012. The 19th may, therefore, just be an educated guess on Telekom's part.
One or more new iPhones should be announced a week to two weeks before they actually reach customers. Something of a preview is expected to take place at WWDC on June 2, when iOS 8 will likely be announced along with other products. The direction of iOS updates tends to indicate possible hardware features, although Apple keeps hardware-specific iOS changes under wraps until devices are unveiled.