According to 9to5mac reliable sources, that new entries has appeared on Apple's inventory system for an iPhone identified as "N94". As you see in the below photo that iPhone N94 is the name-code of iPhone 4S as recent rumors expected.
With one of higher-end models of the N94 iPhone listed in the database with a model number of MD234, the developments may lend credence to a leaked photo of what was claimed to be a label for the white 16 GB iPhone 4S. That label, which surfaced on a Chinese forum yesterday, refers to the lower-end device as model number MD239.[via]
That label, presuming it is genuine, also makes reference to both IMEI and MEID numbers, which would indicate that the device is indeed a world-mode phone capable of operating on GSM (IMEI number) and CDMA (MEID number) networks.
There continues to be no sign of the rumored redesigned iPhone 5 that has been the subject of much discussion since case designs based on a leaked design document began appearing several months ago.