The mobile phone received a yellow message for no reason. How should I stop sending text messages?

That's an advertisement. . . If you have not ordered any information online, and have not filled in your mobile phone number online. . . Then, there is only one way, that is, in the information settings of the mobile phone, find things like "receiving advertisements" and "receiving * *", and press "No", all advertisements will be blocked. That's what I did. But the phone model may be different, so my answer can only be used as a reference. My mobile phone is a Nokia S60 smartphone.