My mobile phone can't send short messages, but it can receive and answer calls. The center number is correct. My mobile phone and card are fine. I tried. What's the emergency?

What do you mean, both the phone and the card have been tried? You mean the card can be sent on someone else's mobile phone? In fact, if you encounter this problem, try changing your phone and card first. If the mobile phone can be changed, it means it is a mobile phone problem. If you can change the card, it means it is a card problem. At present, some companies have a short message limit, such as 1000 or 2000 messages a day. If you exceed the limit, you are not allowed to send a message, or you have been sending a message to a mobile phone number, but the other party is turned off and he receives a full message. If the other person doesn't turn on his mobile phone to read the short message, he will