Source: android authority
Not all phone cameras have a flash and although in PNG we don’t often need to use a flash because often times we get enough natural light, however there are moments in the nights or in dimly lit rooms where a flash comes in handy. Most phone cameras have a built-in LED flash but the flash is not handy if the subject is far from the reach of the flash and when taken from close the colours are also distorted.
The above shows the hardware that goes into a typical smartphone camera | Source: Mailonline
HDR, or High Dynamic Range is a feature designed to help you capture photos that have a better dynamic range. This feature is actually important in PNG as our weather provides many heavily backlit scenes with lots of sunlight. This feature is useless if people are moving as your phone is actually capturing three images and combining them so any movement will show in the final photo.
Now that you have a fair idea of what features to be looking for it is important that you also do three things before you commit to the purchase: