文中共有10处语言错误，每句中最多有两处。错误涉及一个单词的增加、删除或修改。增加：在缺词处下加一个漏子符号（/\），并在其下面写出该加的词。删除：把多余的词用斜线（\）划掉。修改：在错的词下划一横线，并在该词下面写出修改后的词。
注意：1. 每处错误仅限1词；2. 只允许修改10处，多者（从第11处起）不计分。
Mobile phones are being more wide used. They’re light in weight and easy to carry, offer fast and convenient service for communication. The users use them for making phone call, sending short messages and Internet-surfing. In recently years, mobile phones have become popular to middle school students. Quite few use them to keep in touch with their families and friends, what, of course, was of great convenience. However, I don’t think it’s good to do so. In spite of the advantages mentioned above, student users often waste a lot of time chat on the phone in their spare time. Some even cheat in exams. In addition to, mobile phone bills cost their parents lots of money.