As soon as a friend's mobile phone number is set, he will receive various on-demand deduction messages, ranging from one yuan to two yuan each time. Very annoying. I don't know what's going on, but I'

As soon as a friend's mobile phone number is set, he will receive various on-demand deduction messages, ranging from one yuan to two yuan each time. Very annoying. I don't know what's going on, but I'm struggling now. You can contact mobile banking to see if you have signed the relevant agreement. If some agreements are signed, the fees will be deducted automatically. Or I have some settings on some related game software. This will lead to the deduction of fees, so it is best to contact the customer service staff to ask clearly.