Tim Cook seems to have ruled out the possibility of an iphone 5coming with a 4 inch screen, according to the website The Verge,  Tim Cook speaking at the D:10 conference says:-                                                     

” One things is that we’re not fragmented. Look at the percentage of users who upgraded to IOS5. We have one App store. We have one phone with one screen size, one resolution. So it’s pretty simple if you’re a developer”.

This comment made by Apple’s Tim Cook at the D:10 conference seem to conflict with most of the rumours that are flying around out there at the moment, that are claiming that the iphone 5 is coming with at least a 4 inch screen. 9to5Mac for example, who are a reliable source are claiming to have leaked images of parts of an iphone 5. As you can see in the image above courtesy of 9to5Mac here is a screen measuring 3.999 inches diagonally from corner to corner.

In reality nobody knows for sure what Apple has up it’s sleeves when it comes to the specs of the iphone 5, Apple have a good record of keeping secrets regarding their future planned products. If Apple fail to bring out a new iphone with at least a 4 inch screen, they are at risk of falling behind its competitors. This is because many of the top end smart phones, such as the HTC One X and the Samsung Galaxy S3 are coming packed with better features like quad-core processors, gorilla glass and almost five-inch screens.