Cellphone addiction: Positive and negative effects of smartphones. Cellphone addiction is defined as a constant and uncontrolled use of the mobile phone that affects a person's daily, work, social, and family life. Research indicates that this is a behavioral addiction as it presents phenomena similar to chemical addictions such as tolerance, withdrawal, and loss of control. Mobile phones are very good tools that allow and facilitate communication and the development of tasks since, with the advancement of technology, they are designed better every day; however, the responsible use of this tool is important for the proper development of our personal, family, and social life. The people most likely to develop mobile phone addiction are young people and adolescents. Uncontrolled use of the cell phone can cause mental and physical health problems such as: *Stress, anxiety, and depression *Sleep problems and fatigue *Physical pains such as tendonitis, headaches, and postural problems...