Mobile phones tend to produce and distribute harmful rays that are not good for the body. Plus, they also heat up if you keep them in a place that doesn’t allow them to breathe, say in between your sheets or under the pillow. There have been a lot of cases when phones have exploded this way because of negligence, and it can be life-threatening. So, it’s always a good practice leaving the phone on a table or in the living room when you rest in the bedroom.