I am also seeing inconsistent 2GIG service speeds. I am in Viriginia Beach, VA. When I got the service, it operated normally (i.e., speed tests consistently showing 1900-2100Mbps download and 117-119Mbps Upload) for two months and then it became erratic in speeds dropping to 940Mbps downloads, uploads were normal. Cox shows no outages or issues; I am able to reset my Netgear CM3000 remotely via Cox app and nothing changes in regard to erratic speed behaviors. I have powered off-on reset both the modem and Netgear Nighthawk WiFi router (AXE11000 RAXE500) with no changes to symptoms. I just ran a speed test and got: 1120Mbps down and 118Mbps up, after a complete power down and up of both the modem and the router. Note: the placement of my modem & router has not changed, or have I added any electronic devices near the position of the modem/router that may cause interference. Everything worked normally before the erratic behavior just stated on 13 March.
My street areas have had some connectivity issues in the past year, but Cox Tech Support says all those problems have been fixed.
My neighbors are seeing similar inconsistencies with their 1 GIG service.
How do you get Cox to run their remote diagnostics on my area? Cox tech support consistently says, "we can send a tech rep to your house but that will cost you a service charge".