Why can't SMS China Mobile Customer Service be deleted?

First of all, there must be something wrong with your operation, otherwise you can delete any information you have. You can also delete the contact information of this customer service in the address book. I won't ask you directly, because there are some problems with your operation. What exactly do you do? Instead of doing such a thing. Different mobile phones have different operating modes. In general, you can press and hold the message you need to delete, and then pop up this check box. You can select it and then delete it. Of course, it is not excluded that some complicated mobile phones such as 1 may not do this, but they can be deleted as a whole.