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The MOD is correct. TWC has downgraded your speeds because you own it. I use to pay for the 300mps and used their SBG6580 and got close to 300mps over three years ago. My assumption is that a lot of people started purchasing modems and they lost too much $$$. That manufacturer comment is a crock of crap. Its what they are allowing you to have because thats just how they are. Gotta love greedy Merica. I am basically dealing with the same issues. I purcahsed a ARRIS SBG6782-AC which use to be on their 300 list as well as the SBG6580 which I also own... maybe you can explain why MOD?