There are two curved smartphones rumoured to be in the works: the LG Flex and the Samsung Galaxy Round.
The image shows a device very similar to the Galaxy S4, despite the original rumours saying that the Galaxy Round was more likely to be similar to the Galaxy Note 3.
DJ Lee, the head of strategic marketing for Samsung's mobile business, has confirmed the company's plans to launch a curved phone sometime in October, although no official details have been given.
The curved smartphones from LG and Samsung were originally anticipated to have flexible screens, although it now seems that a fixed curved is more likely. The screens will also be plastic OLED rather than glass, adding a degree of durability to the device.