Internet Instability
The cox internet is over capacity. if you experience instability, it is not your router, not your cable, not your fault. Don't upgrade to Gigabit speeds if you have 150mb. Your router does not have too many devices (that are typically dormant and not using bandwidth or shut off). Don't fall for it. An ethical company would just admit they are having capacity issues due to Covid and lower your price bc you are not getting what you paid for. CoX has a monopoly where I am. My alternative is ATT DSL. That's it!
Good customer support takes responsibility and does not have the customer run out to a store to buy a new router they don't need . My cabling checked out. New router. Same problem. They wasted "my" time and knew what was really happening. Just tell the truth.