I buy this modem because my speed vary drastically at different time of the day , especially between 6pm to midnight when I need the internet the most , the speed would drop to less than 8 mbp . I call the isp and they say that there be something wrong with my signal strength , but they sell I a higher plan that go from 20 to 30 mbp . that do not seem to improve . the cox service guy come out and replace all the connector , say the problem of reduce strength be due to bad connector . well , that do not seem to improve . the same service guy disconnect my phone and it take another service visit two week later to fix my phone . the second service guy do not fix my Internet speed either . I call the service department and the technical help say maybe I should replace my modem from the old Motorola Doscis 2 to Doscis 3 . Got nothing to lose except maybe another $ 100 to try something else . well , that seem to solve the problem . whereas before I be get 8 mbp from 6 to midnight , I be get 20 + Mbps during those time . mostly I be get 30mbp . I be happy .