HTC M7 is being considered the camera wonder in the smartphone world, thanks to its ultra pixels. Yes they are called ultra pixels which are a specific type of sensors imbued with three layers each with 4.3 MP resolutions. Ultra pixels allow for sharper and accurate color reproduction much better than any of the current smartphone can present. So that means HTC M7 would bring a tough competition for apple iPhone 5 and Samsung Galaxy S3.
It is also being heard that sensor on HTC M7 are almost like the ones on Nokia 808 pure view which is endowed with 41MP sensor.
The rumors about HTC M7 camera is that it will have a 13MP camera. The more about HTC M7 would be released on February 19th , the day when phone would be launched.