Hello, I know this question clearly. I have been to the telecom business hall before, so here is a detailed explanation. Telecom started when you installed it. Normally, you pay in advance. When your expenses are over, he usually won't stop at once. It's different from mobile Internet access and other operators. He used it first and then gave me the money. When you find that it has stopped, you are already in arrears. If you want to use it for a long time, increase your credibility.