Is residential speed plan increase done remotely or does it require a technician visiting the residence?

Now that I have the Arris G54 gateway activated, setup, and working to take advantage of the faster 100mbs upload speed offered in my service area, I have started thinking about possibly changing my plan to a faster download speed.  I am currently on the 500mbs download plan and am looking at maybe the 800mbs or the 1 gig download plan.  This would be residential not business.

The question I have about this is if I do increase my speed to either of the faster download plans, is that something Xfinity can do remotely or does it require a service technician coming out to the residence and making a change out at the pole where the coaxial cable from the house connects to the Xfinity connection on their cable?