What if the mobile phone can't block spam messages?

It turns out that these spam messages come from iMessage, an instant messaging software launched by Apple. As long as this function is turned on in the iOS device, you can send SMS/MMS between iPhone, iPad, Mac and iPod, and send it via WIFI or cellular mobile data without charging SMS information fee. Information that uses this function is displayed as a blue block, and it is displayed as a green block when it is not used.