Your answer is completely inconsistent with my phone card's inability to send messages. The mobile phone has not blocked short messages, nor has it been blacklisted by others. The mobile phone card ca

Your answer is completely inconsistent with my phone card's inability to send messages. The mobile phone has not blocked short messages, nor has it been blacklisted by others. The mobile phone card can work normally. If your cell phone signal is full and has not been blocked or blacklisted by others, you can only receive messages, but not send them. You can try to restart or change your mobile phone for testing, and check whether the number of the SMS center is set incorrectly. If the number of the short message center is incorrect, you will not be able to send short messages. Generally, you can check it in the mobile phone settings. The number of SMS center varies from city to city, and it starts with +86. If you don't know the number of the local SMS center, you can contact customer service.