iPhone 5C
File photo of an employee showing off an Apple iPhone 5C at a Verizon store in Orem, UtahReuters

After the immense success of iPhone 6 and iPhone 6 Plus, Apple is slowly moving to launch their successors. To ensure it attains similar traction, the next-gen iPhones are expected to come with major developments. As if adding to rumours about a 4-inch iPhone in the works for some time, Apple accidentally posted an image of what appears to be the iPhone 6C. Drawing a close similarity to iPhone 5C, the handset boasts of a Touch ID to differentiate itself from the current model.

Apple leaked the iPhone 6C rendering as part of its recent Lightening dock charger's illustration, The Mirror said. At first, the handset looked more like the iPhone 5C but on a closer look, it is clear there is a difference between the current and the future model. This is the first time we have witnessed a near-official confirmation of a 4-inch iPhone this year.

Apple ditched its small screen iPhones in favour of much-lauded 4.7- and 5.5-inch iPhones last year. The iPhone 6 and iPhone 6 Plus also marked the end of Apple's iPhone series with "C" moniker. Clearly, declining sales of iPhone 5C from the beginning have forced Apple's hand to do so. 

If the iPhone 6C indeed exists, then there is a good chance that consumers will see three iPhones this year. The iPhone 6S and iPhone 6S Plus are expected to be unveiled as per Apple's usual timetable, in September.

With major upgrades to the current iPhone flagships, the 2015 iPhones will actually take the company's standards to a higher level. A recent analysis by renowned KGI analyst Ming-Cho Kuo strongly suggested the iPhone 6S to boast of at least 10 upgrades over the current models. Apple might add a new rose-gold colour variant, sapphire display, 12MP camera, 2GB RAM, Force Touch integration, enhanced audio and more.