With Apple's media event just one day away, three theories have arisen regarding which direction Apple's next iPhone will take.
An Updated iPhone 4
To date most speculation has centred around the question; will Apple release a next-generation iPhone 5 or a modified version of its current iPhone 4?
There is dissent even within the modified iPhone 4 camp over what exact changes Apple plans to make to its current iPhone.
The speculation began earlier in 2011 when a number of media sites "leaked" -- most using unnamed sources -- a series of internal product codes similar to that of Apple's current iPhone 4. Most recently 9to5Mac's mysterious "Mr X" added to these rumours, purporting to have discovered the code names in Apple's internal inventory.
The first code, the N90A, initially led to speculation that Apple was making no additions to its current iPhone. Common consensus regarding the currently fictional device suggested Apple would instead strip the phone down, making it only contain 8GB of internal storage.
The second "leaked" code, the N94, received far more attention. Commonly referred to by the world's media as the iPhone 4S, speculation suggests the device will house a modified 3.5 inch screen, be powered by the iPad 2's current A5 processor and boast 1GB of RAM.
The iPhone 5
The more hopeful commentators have continued to suggest Apple will release a truly next-generation successor to its current iPhone 4. Predictably labelled the iPhone 5, details regarding the future, fabled device's spec remain vague and change rumour to rumour.
Despite the high levels of interest and idle speculation regarding Apple's next entry into its iPhone series of devices, Apple has not currently released any official data on the device.
The only reason anyone even knows Apple will release something to do with the iPhone series Tuesday is the vague "lets talk iPhone" tag the event's invitations held.