A:AnswerNo, It does not come with Cellular modem and hence cannot be added to your wireless carrier. You could get an external one and connect it to the mac
A:AnswerThe computer does not come with virus ware such as Norton, but it has built-in features to help prevent it, such as popup blockers warning you if you want to proceed or not,
A:AnswerYes! But just double check the specific dock you use before purchasing. I have a Dell dock I use at home, as well as a few travel docks and whatnot for specific things like projectors and mobile monitors
A:AnswerThe device should be brought to Apple or a Genius bar to prove purchase and reset the internal owner certificate and allow it to be factory reset.
A:AnswerThere is an application called KDE Connect which runs on macOS and is a native bridge between any Desktop and your Android device. I use it on all of my devices and highly recommend it!
I'm not sure what your specific needs are, but there are also alternatives for other things like Google Messages being available over Chrome, and Facebook messenger being a website already, etc.