Why can't I send text messages with different cards?

As long as the number is not stopped and there is a balance, it may be caused by the mismatch between the SMS center and the local gateway. The number of the short message center needs to be changed to the number of the local short message center. If it can't be sent after the change, you can try to search the operator's network again or try again after turning off the phone. If there is still a problem, you need to add the area code and call back the customer service of the local operator to reflect the situation.