Why is there a discount message from Jin Hui Hotel on the mobile phone?

I found a reply for you: Hello! You can install 36 mobile guards or other security software to intercept spam messages. As for your number. 1. Spam advertisers will send advertisements in large numbers, and all existing numbers will receive short messages. 2. Did you fill in your mobile phone number on the Internet or in public places, or left your number with a certain unit, such as a bank, and some units may sell your number to advertisers privately to obtain benefits. 3. Some service providers often check and test the valid number segments by means of telephone group dialing. After the call is dialed, it will only ring once and then hang up. Advertisers mainly obtain a large number of numbers through the above three ways.