Telephone sales hang up SMS.

This is normal. Even if the information is not leaked, even the new number will receive this kind of phone message. First of all, with the development of the Internet, it is easy for big data to obtain information such as mobile phone numbers. Secondly, the mobile phone number may be left anywhere, such as stations, airports, shopping malls, supermarkets, hospitals, job filling forms, survey filling forms, website registration, etc. , may be collected, and then may promote telephone sales. I don't call you specifically, he may be random. He doesn't know who you are when he calls or sends a message at a certain number. When you answer, he will sell you some business or product service, or commit fraud.

In this case, in addition to intercepting harassing calls, not answering strange numbers can also be ignored. In order to prevent relatives and friends from using strange numbers temporarily, you can confirm them after answering. If you don't hang up immediately, you can ignore the strange information and delete it directly. Even if you receive some official news, you should call to confirm whether there is anything unusual. The verification code must not be leaked.