Debate - Cell phones should be banned in school

I was the deputy prime minister in last debate. The prime minister gave first argument, and I gave our second and third arguments. I would like to write my speech of debate here. (only our arguments)    Hello, young ladies and gentlemen. My name is Rachell. I am the deputy prime minister. Our team stongly support the proposition "Cell phones should be banned in school." Let me tell you what I will be doing in this debate. I will rebut the leader of opposition's arguments, rebuild our first argument, and give you our second and third arguments.(I only wrote our second and third arguments.)  
  Our second argument is that there are possibilities of losing.  If the students put their phones somewhere in school or on the way to the school, it is hard to find them. There are much more possiblities of losing in school, because you may lose it in classroom, on the street, and school buses. You move to other places a lot in school. If students lose the cell phones, they will get in trouble and parents will worry about you if you don't answer by phones. Although, students finally found the cell phones, they should spend much time to find them. And I think it's just waste of time. If you just give it to teacher, you don't have to worry about losing.(The prime minister defined 'banned' as 'teachers take the cell phone in the morning and give it back after school.)  
  Our third argument is that students can use public phones as the alternative of cell phones. Cell phones are for communication, but students mostly use them for games. But they need cell phones not for games, they need them for call in emergency or others. Public phones are just for communication.  They don't even have function to entertain. So students won't play games and it will be benefits to both students and parents. Public phones can't move, so it won't interrupt your studying, too. Also, you can find public phones easily in school, street, and bus stop.