Next time when you cannot sleep at night, take your mobile phone out of the bedroom. Proximity to mobile phones can disturb your good sleep which can cause insomnia and various sleep problems. Try to sleep in a room without mobile phone and/or other devices. Your sleep will only get better and better in time.
In addition, sleeping with mobile phones can cause insomnia and can also cause headaches and dizziness.
According to Dr. Charles Czeisler, the main issue with mobile phones is their artificial light which badly affects our body. Our brain is tricked and thinks it is day. Light stimulates the cells in the retina, the area around the side of the eye that sends messages to the brain. Cells sensitive to light give information of our body that it is a day time.