Nowadays, the teachers don't allow you to take your mobile phones with you in any school and there are many different opinions about this:
One the one hand, children should carry the mobile with them in case some emergency happens . In addition, they could have it but leave away from them to avoid temptation.When mobile phones are prohibited at school, students feel more eager to bring their phones. Everybody knows that things forbidden are more attractive.
On the other hand, today, there have been many problems caused by children who take photos to their teachers and other children who have stolen money, phones.. and that is why mobile phones have been prohibited at school.
To sum up, the mobile phones should be allowed but under your own responsibility, knowing what may happen.