I'm a 12-year-old girl and I want to have my own cellphone because everyone else in my class have one. I just want to be part of the group and join their conversations. My mother did not refuse my request, but she asked me how to solve her concerns about the potential harm to me. What should I do to convince her to give me a cellphone? Here are here concerns:
1. Using cellphone too much would harm your eye sight. Especially for teenagers, whose eyes are still growing, it's very easy to have near-sight pretty quickly.
2. Using cellphone too much would take too much of your time, and you would spend less time reading books, doing exercises, playing outside, talking to people, which harms your overall development. Adults like me already ready lots of books, did lots of exercises, and talked to a lot of people when I was a teenager, so I already developed those skills.
3. Using cellphone too much would make you feel hard to focus on one thing. The scattered information would stimulate your attention, and make you feel excited at superficial contents, and don't think deeply.
4. You might accidentally lost your cellphone, and you will feel sad about it. Teenagers usually are more likely to lost things than adults in general.

Hi mom, I think I can handle the problems you mentioned properly. I will control myself and won't use the cellphone too much, and I promise to not losing the cellphone. Please give a cellphone, thank you mom!