Why does the mobile phone of Telecom refuse to send short messages?

Hello, your telecom mobile phone needs to refuse SMS. You can install software such as mobile phone firewall on your mobile phone. After installation, set the mobile phone number that needs to be rejected. This number can't send text messages next time. By the way, I recommend a mobile phone for you:

If you have any other telecom problems, please log in directly to the online business hall of Anhui Telecom for consultation! thank you