I just received a technicolor cgm4140com with the noise issue that I have been advised is not normal. I have heard of people going to the store, plugging them in, and other units had the same problem.
My question is whether I can go to the Comcast store without taking my current noisy gateway so that if they don't have a proper unit I don't have to reinstall everything. If they do have one then I will bring the noisy gateway in the next day. I already have an xb3 on the way back so I don't want things to get too confusing.
If you do go to the store, I would just bring it with you in case if they might have one that runs silent so you that you don’t have to go back and forth twice. Even at the store, it’s not a guarantee.