Final answer:
Cell phone use can have both positive and negative impacts on teenagers, including affecting their ability to focus, their relationships, and their sleep.
Step-by-step explanation:
Cell phone use can impact teenagers in various ways. While cell phones make it easier to stay in touch, simplify planning, and increase productivity, they can also have negative effects. Studies have shown that constant device usage can make it harder for teenagers to focus on tasks, give people their undivided attention, and forget about work at home or on the weekends. Additionally, excessive cell phone use can contribute to sleep problems and affect relationships.