you should know that Netgear do not sell this modem to individual , only isp . at least that be what Netgear keep tell I . it be pretty frightening when a company that be suppose to be a major internet player can not do a Google search to see that over 100 store sell this modem directly to user . my cmd31t die six week after it be purchase . one day it be work fine and the next day i have no internet connection with my isp . first I call my isp and do all the stuff they ask . then my isp send out a technician with a network analyzer . my connection be fine , the modem be not . then the nightmare begin . the Netgear support number connect to a call center in India . everyone there follow the script exactly . the first customer Service Representative -lrb- CSR -rrb- tell I that Netgear do not do support for this modem , I have to call my isp . I call my isp to check and they confirm that since this be a privately purchase modem that Netgear be responsible for support . the second CSR have I do a bunch of diagnostic step . nothing work , but since I could still see the GUI in the modem , the modem must be fine . the third CSR tell I to call the isp and when I ask to speak to a supervisor , blow I off . the forth CSR say someone from Netgear would call I . I be still wait for a RMA so I can return this modem two week later . BTW , forget any support if you run Linux . you can tell the CSR you IP address , dn , and default route , -lrb- which be much easier to find in Linux -rrb- but if you be not run windoze they tell you they can not do support . the technician from the isp recommend Arris or Motorola . I buy a Motorola modem because I might not ever get a rma from Netgear . if you buy this modem and it fail you will not get any support from Netgear . 9 March 2012 Update : my first Email contact with Netgear be 22 February 2012 . I have send they my Amazon purchase receipt twice . still no rma from Netgear . I be send a email to Netgear Technical support every few day tell they I still have not receive a rma . if I ever receive a rma I will post how long it take . so far my Motorola surfboard sbg901 be work O.K. it be not DOCSIS 3.0 but at least it work . 22 March 2012 Update : it look like Netgear be never go to send I a rma . the only response I get from Chithra or Vishnu or Simbhu or Arif be `` please wait so that they can get the necessary detail from they to assist you better . '' I will be happy to post or forward any of these email from Netgear . Netgear automatically close any support case in seven day if you do not reply to they Email . they be hope I will get tired of wait and just write off the $ 90 I pay for the cmd31t . please think twice before buy any Netgear product 24 March 2012 Update ; check out the comment from Netgear !!! they will not respond to my support case but they sure as heckfire will try and spin bad pr !!! oh , ipv6 be the problem ? then why have my Motorola modem work perfectly the day after my Netgear modem fail ? maybe Motorola make a better product than Netgear . or maybe my isp temporarily switch to ipv6 and then wait until I call to tell they I buy a Motorola modem and immediately switch back to ipv4 so the Motorola modem work . Hmmm ... I wonder ?