I didn't use my mobile phone to surf the Internet, and Mobile even said that I used my mobile phone to surf the Internet, which deducted my expenses.

You should carefully check your phone bill and see where the traffic fee comes from. In addition, some built-in menus of mobile phones, such as Monternet, need traffic. In addition, if you suspect that there is something wrong with the mobile server, you can turn it off after 10 at night. If this is still the case, we can determine the movement problem.