when you get a new modem and call your ISP to register it, it DOES take maybe a day or 2 to get your speed normal speeds. like with me, i had a linksys modem. started to f*ck up so i went to buy a new one (motorola). called Comcast to register modem. did speed test that night and the next day was averaging half of what i am suppose to get. on the following day my speeds were back to normal