Should children ages 10-15 year olds have a phone (smartphone, why or why not, also explain to me why you think this aswell. be honest, and serious here.

Nope, phones cause a serious distraction. Especially for younger kids, like me. It can lead to Short Concentration, constantly losing track of what they originally thought about. They won't be able to think about something for long periods of time of they're always checking their phones for a text or notification.

Amusical im pretty sure