Students must have smart phones. Do you agree?

In my opinion I think that it is very useful for students to have a smart phone.

I think that it is best that all students must have a smart phone because we are in the technological era and we humans cant live without technology anymore.

I think that it can help students with there homework and with there study but I am against students that dont anything except playing games and calling.

In conclusion I think that it is handy for students if they use it usefully and dont play games and cal all day.