The reason for receiving sales calls may be that they often buy things online, and some web pages will reveal their addresses and numbers. You can choose to join the blacklist and automatically block spam calls. ?
I often meet someone sending out questionnaires in the street. At the end of the questionnaire, I will ask to leave my contact information. If you leave the correct number and a strange phone call comes in, you should be worried, because your mobile phone number may have been leaked.
Advertising sales phone.
Advertising sales refers to the advertising behavior of conveying commodity information to customers through publicity, arousing their desire to buy and promoting product sales. It is a widely used form in enterprise product promotion. An advertisement that explains what kind of demand the product can meet, what outstanding characteristics the product has, and indicates the purchase price and place. ?