Why can I get a message interception prompt when my mobile phone is hacked?

The reason why you can receive SMS interception prompt when the mobile phone is hacked is because the blacklist is the system setting of the mobile phone and it is impossible to intercept SMS in the carrier server. The mobile phone blacklist is not the interception on the operator's server, but the interception mechanism of the mobile phone itself. After receiving the blacklisted phone number or short message, it can intercept and remind.