Apple has yet to make any kind of official announcement regarding when the next iPhone will be unveiled and become available, but we're almost positive we know the dates. Apple is expected to debut the handset on September 12, and launch it in stores on September 21.
There's already a mountain of evidence in favor of this timeline, such as reports from multiple credible sources and news outlets, and blacked out vacation dates for Verizon employees. But in case you needed any more proof, AT&T employees have just thrown their hats into the ring...