As for the Unicom card, I have already owed money, but I can still receive text messages. How can I use it to squeeze this card dry to the maximum extent?

Hello, you are in this situation because you have a credit point; But there are advantages and disadvantages;

Generally, you can stop the machine when it is about 100.

I suggest you stop using Unicom card immediately and use a new card to avoid affecting your personal credit;

Glad to answer your questions, welcome to ask questions, you're welcome, hehe;