Why is there no charge for sending text messages on my mobile phone?

This is a mobile internal problem. My classmates have encountered similar problems. His mobile phone card does not cost money to download games and other things. After all, there are so many users, because there are always several cards due to system problems. Don't worry, it's too late to get such a card, so there's no need to worry.

If you are really worried, I will exchange cards with you.

Hmm. How interesting