Long-term use of a mobile phone to read novels may bring the following disadvantages: 1. Impaired vision: Staring at the phone screen for a long time may cause eye fatigue, dryness, vision loss and other problems. 2. Pain in the neck: improper use of the phone may cause neck soreness, stiffness, and other problems. 3. Radiation: The mobile phone will continuously emit electromagnetic radiation during use. Long-term contact may cause adverse effects on the human body. 4. Addiction: Overuse of mobile phones to read novels may lead to addiction, affecting learning, work, and social activities. 5. Addicted time: The time spent reading novels on the phone may exceed one's ability to control, causing addiction to affect one's physical and mental health. Therefore, in order to maintain good vision, neck health, radiation control, and physical and mental health, it is recommended to use the phone to read novels in an appropriate amount and maintain a good posture and use time.