Broadband password not being accepted by router

[#1]

Hi, I hope someone can help as this is driving me insane. I have FTTC.  I've been have a couple of disconnects every day, prior to this it used to go months without disconnecting.  Openreach have been out and said they can't find a fault so they feel it may be my router (Netgear D6400).  I thought I would try the plusnet router again to see if it made a different, however I can't get it to accept my broadband username and password.  I have tried 2 plusnet zeros, and a BT home hub 4.  I know I am entering the correct username and password.  I can connect no problem on my Netgear 6400.  Any suggestions?!

[#2 · Accepted solution]

The Hub zero and BT Home hub 4 do not have vdsl capable modems, so they will not work on FTTC without a separate modem

[#3]

That explains it then, thank you.  I'll get hold of one of the plusnet hub 2 to try.

[#4]

@joarm  As an inexpensive test you can put the D6400 into modem only, then attach the BT router.