So I'm at the end of my rope this week. I've called Verizon 3 times already, had an online tech support, and a tech come out to my house in the past 4 days. Same problem. I'm wired to my router and its about 5 feet across the room. The tech checked the router and said it was fine. The ONT/black box was replaced in my home to see if that fixed it. It did not. Whenever the support inevitably resets the ONT/releases my IP address, it works for about 8 hours.
I'm supposed to have 100/100 but EVERY night starting at 6pm EST my internet speed drops to a measly 10-20 MB/S. Bad enough to where streaming a Netflix/HBO episode creates constant buffering. I've restarted my router several times. I've dedicated at least 8 hours to this issue with techs on the phone/online/in person this week alone. I'm not sure what else I can try. The router is new, the ONT is new, the wiring is new (I just moved here and watched them install everything.)
For example: Today my ping is 115 ms, download speed is 15.16 mb/s, and my upload speed is at 42.42 mb/s. This is about a weeklong problem at this point.