Constant exposure of the human body to mobile phone screens can lead to sleep deprivation. This condition causes a variety of health problems, one of which is memory loss. When the body doesn't get enough sleep, the connections between neurons in the hippocampus (the part of the cerebral system that controls various bodily functions) weaken, leading to poor memory.
Increases risk of depression
Using a mobile phone in a dark room increases the risk of depression. This happens because the hormone melatonin is disrupted and sleep time is disturbed. This can affect parts of the brain that regulate emotions and anxiety.
Here are the best things you can do to avoid the dangerous habit of opening your phone screen before bed. Get into the habit of not using your cell phone between 8 pm and 9 pm. Maintain sleep quality and sleep rhythm. Reduce phone usage for non-essential tasks. To optimize precautions, you can turn off your mobile phone at least 2 hours before your break begins, day or night.
Use phone applications wisely so you don't have to rely on your phone. Keep your phone far enough away from your bedroom to ensure a safe distance for your body and brain health.
the source : https://id.wikipedia.org/wiki/Telepon_genggam