and If i'm hosting a meeting and you pull out your phone, multiple times, I will ask you to leave my meeting (using royal you, not you you)
its not just rude, it's also a distraction that Might have you miss valuable and important relevant information to your job and the project at hand.
if i've invited you to a meeting, I've invited YOU. not the people on your phone.
You seem to forget a phone nowadays isn't just a phone anymore. For me it's a working device where I put notes, appointments, mails.... So it's perfectly acceptable to keep your phone on the desk during a meeting.