1. The most important thing is not to expose your privacy and do not use your mobile phone or ID number to register information on some informal websites. 2. Today's mobile phones have high security performance. If the call is a harassment call, it will be displayed. If you see it is a harassment call, hang up without hesitation and do not answer it. 3. If a friend borrows money from you on the chat software, it is best to call the other party to confirm. Listen to his voice. It is your friend's voice, and confirm that he really borrowed money from you on the chat software. , you should consider whether to borrow it again. 4. If you receive a call saying that someone in your family has an accident and needs money, you should call back first to confirm and confirm that it is true before sending money.