Charm Blue 2 can receive short messages, but can't send them. What should we do?

I suggest you check the following troubleshooting steps:

1. It is recommended that you click SMS-Menu-Settings-Advanced Settings-SMS Center Number to reset.

I suggest you try to call a friend to see if you owe money.

3. I suggest you try whether other cards can be used normally when plugged into your mobile phone.

4. If it still can't be solved, please back up the data, enter the recovery to clear the cache, user data and all data, and try not to recover the data and send SMS directly after entering the system.

5. If it still can't be solved, it's recommended to back up the data and try the latest development version.