But if you must argue on the positive side, then:
Most importantly, 1 is convenient for contacting parents. We must look at this problem realistically. The contact between children and parents is the need of the current society, not that opponents say it is unnecessary to contact.
2 communication with teachers, if you often go to the teacher's office, is likely to be labeled as a small report. It's not the same with a mobile phone. If you have any questions or troubles, you can communicate at any time.
It is very important to call for help and call the police in an emergency, which is irreplaceable by other means and directly related to life safety.
We don't always use mobile phones, so of course we have to turn it off in class. This is both a rule and a self-discipline requirement. If the other party catches the problem of using them in class, warn the other party not to generalize, depending on the supervision of the school and the prestige of the teacher.
The progress of science and technology and civilization is all-round, and everyone has the right to enjoy it.
Using mobile phones helps us to keep in touch with old friends, facilitate contact with new friends and increase communication.
Students in the new era need to be sensitive to high-end electronic products.
The radiation and eyesight of mobile phones is a very unfavorable topic, but it can change the subject. Not only do mobile phones have radiation, but other household appliances are also very serious. How to reduce radiation is not just a problem of mobile phones, but a common problem of all electrical appliances, which requires continuous efforts.
Can minors get a card by using their mobile phones to surf the Internet? I haven't studied it. I remember it was for adults, so it was simple. Adults set a set meal and charge the phone bill. Adults can check the surveillance. The most important thing is education and guidance.
10 playing games is actually the same as computers and game consoles, not just mobile phones, but self-discipline.