Is there a hint when texting is hacked?

Texting is hacked, and there will be no prompt. When a short message is hacked, there is no hint under normal circumstances, because the sending and receiving of short messages depends on the communication between mobile phones. Once the short message is successfully sent to the receiver's mobile phone, the process is over. When the short message is blacked out, the receiver's mobile phone will directly ignore the short message and will not feed back any information to the sender, which means that the sender cannot know whether his short message has been received or intercepted. Blocking refers to adding friends or others to the blacklist to prevent someone from speaking. Blackout, as a fashion expression, can be extended to the emotional rejection of an event in real life and someone who will be separated forever. In applications such as social software, blocking is an effective way to reject harassment and malicious behavior, which can protect users' privacy and security.