Internet doesn't appear to be upgraded

I upgraded from 500MBPS to 2000MBPS. It said I have all the right equipment. I followed all the procedures and recommendations. The speed is still reading not quite 500, some devices it went down to 150. Everything has been restarted several times. Your app weirdly reads at 2100 in a speed test on a phone. Yet nothing else is close. Is there something you need to activate on your end? Most related older posts say the same sort of thing, nothing worked until xfinity did something to activate it their end.

Thank you.