I actually had the same speeds with that plan myself, ranging between 4300 kbps and 4800 kbps. I'd call every day trying to get it figured out, and had service call after service call. After 5 service calls and 6 different technicians (2 on 1 visit) I was still at the same speeds. On the 6th service call the tech came out and replaced my COAX and my modem and my speeds jumped up considerably. They hooked me up with the SurfBoard 5120 and got 10,000 kbps up to the neighborhood of 13,000 so far and I am still on the same plan. My upload still sucks...lingers in the neighborhood of 358. The modem that I did have was the SurfBoard 3100, old gaudy white one that I had for 2 years and never really had connectivity issues with.