The phone was used in the classroom as bad manners and don't deserve respect, not as an instructor. But vice versa. Communication tools can be useful for people looking for information about students.
Bringing the phone to be used in the classroom is bad manners and does not deserve a failure to respect the instructor. But on the other hand, Communication tools may be useful to people for the report.
Application of cell phone use in the classroom is not good manners and didn't deserve is disrespectful to the teaching, but vice versa. Communication tools may be useful in getting people to find information in class.