Camera

[Dakshbora]

Video quality of stock camera should be improved in Samsung galaxy m30s during night there are very much grains in video and looks like video is playing like it is in slow motion 

[Prajwal2003]

Because light play a very important role in photo try using some flash which may help you but low light is always gonna be worst in any smartphone

[Dakshbora]

And pro mode features are also not enough like there is no shutter option , no option to set focus

[Prajwal2003]

it's a smartphone camera what do you expect you can try using 3rd party camera app or not satisfied try using custom roms