Can the mobile phone number that sends fraudulent text messages be blocked? Is it useful to send it to 10086999?

It depends on many things. Nowadays, there are many ways to cheat people by SMS, some of which are violent. For example, directly use the instrument to simulate the base station signal within tens of meters around to send information to the mobile phone. There is also sending text messages directly to mobile phones through network software. It is rarely sent directly by mobile phone. So generally speaking, the direct effect of reporting mobile phone information is probably not ideal.