You can call out when you buy a telecom card, but you can't answer it. It's always like this when changing mobile phones and cards! I communicated with 10000 and it didn't work out. what can I do?

You called telecom customer service 10000. Did they explain what the mistake was? When you say it's all the same to change your mobile phone and card, you mean you can't pick up this telecom card if you change your mobile phone. Can I only call? Is the mobile phone card in normal condition? I suggest you go to the telecom business hall to have a test. You can make an appointment in the business hall through the official account of Telecom WeChat WeChat, which saves you the time of queuing in the business hall. Web page link