HTC's One M9 smartphone failed to set the world alight, and reports suggest that the company is already working on a successor.

The handset is in the works under the codename of HTC Aero and will include a "ground-breaking" camera, Digital Spy reports citing HTCViet.

The One M9 successor is said to feature a f/1.9 aperture for improved low-light shooting, and capture imagery in the RAW format.

HTC has previously claimed breakthroughs in smartphone camera technology, but the Ultrapixel snapper on its One M8 proved divisive.

This was ditched in favour of a 20-megapixel sensor on the One M9.

Last month, HTC was forced to lower its second-quarter sales forecast by 30% to $1 billion due to lacklustre sales of the One M9.