My mobile phone always receives strange text messages. Give me a website and tell me that my system is not good and there are MMS. Is it poisoning, or don't order it at all?

This is called service information. It is best not to open it. It's usually a lie. After you open it, your phone bill may soon be gone, and the deduction is extremely severe. There are also some links to viruses. If your mobile phone is a smart phone, clicking it is likely to be poisoned. Some of them are sent by mobile service providers, but they are basically useless. It's all news or advertisements. It is recommended to close the service information: menu-information-options-settings-service information-close-OK.