I have the Fibre uprunning a few days ago and have been trying to replace this modem with a better one.  I bought a Netgear R7000 at end of May ready for the upgrading from ADSL to Fibre.  It is now over 90 days, no more phone support would be provided by Netgear.  I switched to ASUS RT-AC68U, the ASUS support could not get me going and advised me to replace the HG630b with a modem router.  I am getting confused.  Is HG630b just a router when connected to fibre?  I always thought the ONT is a modem.  Can anyone enlighten me and advise what can be used to replace HG630b.