假如你是王飞，今天你收到了好友李磊的一封信。信中说他想买一部手机，为此他想征求一下你的意见。请你根据以下提示，给李磊写一封回信，建议他不要买手机。
1、校内不允许使用手机，因为会打扰别人；
2、发短信等会占据太多的学习时间；
3、经常会收到一些不良的短信；
4、手机费会增加父母的经济负担。
注意：
1. 回信需包括以上全部要点，但不得逐句翻译；
2. 要符合书信的格式要求；
3. 词数：100左右
参考词汇：短信 the short message; 打扰 disturb 手机 cellphone
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Dear Li Lei,
I’m very glad to receive your letter today. How are you getting al
ong with your study?
In your letter, you asked me whether you should buy a cellphone or not. In my opinion, it is unnecessary for a student. Why? First, sending or receiving short messages takes up too much time. Therefore, the time that you should spend on studies becomes shorter. Second, it is forbidden to use cellphones at school because sometimes you have to answer the call in class. As a result, your behavior may disturb others. Third, you may be disturbed by some unhealthy short messages. Finally, as a student, you have to a
sk parents for the phone expense, and they will have to spend more in supporting you than before.
In short, I suggest that you think it twice. Best wishes.
Your friend,
Wang Fei
答题时应该根据内容要求组织语言，要将相关内容表达全面，而且做到语句通顺。