My mobile phone prompts that the SMS port is occupied. Why can't I send a message? What should I do if I delete two antivirus software and still can't send it out?

I want to say that if there are no more than two security software installed, it is a system problem. Please try to restart first. Not once. You also have factory settings in your mobile phone. You won't delete the software, just restore the factory settings. Soft grid is to enter *#7370# and password 12345 in the dial-up interface. This is a complete factory recovery, and all information telephone software will be deleted, so you should back it up in advance.