I use the school telecom card, but I use the old Tianyi mobile phone. Fortunately, I used to use electrical signals. Most students use Unicom's mobile phone number before the start of school. You can't plug in a telecom card in that kind of mobile phone. Tianyi mobile phone in school is very rubbish. It's not cost-effective to spend thousands of dollars to buy a mobile phone in order to change the number, so many people want to return Tianyi mobile phone. However, if you haven't bought a mobile phone, I suggest you buy a satisfactory Tianyi mobile phone. The telecommunication signal is good, and there is never a problem in making a phone call. Besides, I need a telecom card to surf the Internet in the dormitory. Many students who bought computers later are looking for students who use electric signals to open the network through their mobile phones. . The basic cost of 28 a month, plus computer networking 30, is still very cost-effective. . . In addition, the internet speed is also quite fast. I don't know if boys will be satisfied if I watch pps online and have never played online games. . . It's all personal experience ~