Why are some people intercepted when they send me text messages?

Why are some people intercepted when they send me text messages? See how the SMS blocking function of your mobile phone is set, and whether they are set to. Well, a blacklist or something. It is also possible that they just use the mobile phone identification system. Treat the messages they send as spam messages, and they will be intercepted. You can turn off this function, turn off the short message and spam message function, like the message sent to you by anyone in Nanjing. There will be no interception. So the message you intercepted before may be caused by this function. The liver function recognizes short messages sent by others, which are spam messages and will automatically intercept them.