Cheap cheap phones for a reason. Despite how companies try to play them, they will always lack some hardware that allows this or that feature. Sometimes, such hardware becomes something we take for granted. Like an ambient sensor that allows the phone to adjust brightness automatically depending on the environment. Samsung's Galaxy budget phone doesn't have it, but it seems the company has found a rather strange way to overcome these limitations. All you need is to take a selfie.
No, don't worry, the cellphone won't take a snapshot of your face and send it to the Samsung server. However, it will use a front-facing camera to take fast pictures, regardless of whether your face is present or not. And according to Samsung's notification, images won't be stored anywhere, even on your mobile.
So this is how it works. Activating the Auto brightness feature that was not on a cellphone that does not have an ambient light sensor will cause the phone to take pictures every time you unlock the cellphone. The image will be analyzed to determine the lighting conditions at the time given. Presumably, the photo is then immediately discarded.
While that seems to be a smart way to replace the loss of the ambient sensor, how to adjust the brightness may not be so smart. This will match the lighting conditions analyzed from the selfie with the brightness you set. In other words, you have to practice it manually for a while before starting to do things automatically.
Currently, updates that carry this feature have been launched only to the Galaxy J8. Hopefully, it will also come to other phones in the Galaxy J series but, considering this is Samsung, it's very uncertain.