Why can't the mobile secondary card send text messages?

It may be that the machine card is incompatible, and sometimes the card will be like this after being used for a long time. Please restart your phone first to see if it is ok. If not, try installing your own card on someone else's mobile phone.

And then try to put someone else's card on your mobile phone.

2, mobile phone problem handling methods

Let's see what's wrong with it If it's a mobile phone problem, go after the sale (less likely, more domestic machines)

3. The solution to the card problem is the card problem. You can call Mobile 10086 to explain the situation. Ask him to help you do hlr data synchronization, and do intelligent network data synchronization operation by the way, which can generally be solved. If it can't be solved again. Just take your card and go to the mobile company to reissue it (if you can make a phone call but can't send a text message, it's free to reissue it). Because there is something wrong with the mobile card).

4. Local network congestion

This possibility is very small. You can wait a few hours and see if you can send it.

I have dealt with many user complaints before, about this kind of problem. It's usually easy to solve. Don't worry. Take your time.