buy it half a month ago because of its tempting low price -lrb- around $ 20 -rrb- to replace the rental modem from Comcast . sadly however I try it do not work at all . finally I get a Comcast technician who confirm it be not my problem but this gadget 's . also , the power cable with it be not original and do not match up -lrb- 0.8 a require vs 1a by the cable -rrb- .