Replacing BT "Smart" hub.

Hi.
My parents unfortunately have a BT smart hub. Every day this router gets a system error SD-100, losing connection (solid orange light so hasn't lost sync) and then spends eternity enabling/disabling UPnP, saving wireless settings, DHCP etc and not reconnecting. Even trying to access the web interface during this time is impossible, unreachable error straight away so it needs a reboot, then it works for a day till the same thing all over again.

I've replaced it with another smart hub once which worked for a week till it all started happening again.

So as the web interface becomes unreachable and it doesn't seem to lose sync it looks like it's a router problem.

So any suggestions on a replacement? My first thought was an Asus DSL-AC68U which I'm sure works solidly as a router but googling around it seems to have issues with VDSL: connections and stability.

So any suggestions/recommendations for a good, solid VDSL modem/router for BT Infinity 2 use?

Thanks

Huawei HG612 units - or as I am using a TP-Link W9770 £35 on amazon while a basic modem/router in its own right, just flip config into bridge mode and wireless turns off and you have a G.INP/Vectoring cable bridging modem. The wifi antenna don't detach without a little surgery.

Finding it very stable and if anything speeds are slightly higher than previous modem used (cursed with a supplied ECI box).

The issues with the SmartHub seem to partially affect previous versions, i.e. resyncs mean things like the wireless drops i.e. resync are more like a full reboot of the unit.

Hi Saffron
If I'm honest the wifi on the smart hub has been stable, it's just completely unable to maintain a connection without going off.
When it does DHCP still gives an IP address but can't access web interface or get an internet connection, it also responds to pings.
When I was getting the first replacement the guy in the call centre tried to tell me it was a line fault even though I told him the router becomes unresponsive and it doesn't appear to lose sync.

I'll try find an HG612 on ebay but that isn't a complete solution since if it breaks/fails I'd be back to square one trying to find a replacement again since BT don't supply them unfortunately.

The chaps at the call centre can run tests to determine if there is a line fault. How do you know there isn't, out of interest?

the online automated fault checker said it's connected and stable.
The last time i contacted BT they only bothered to check disconnections.

Yeah but "the guy in the call centre tried to tell me it was a line fault ". Was he wrong?

yes he was. simple as that.

What router do you use?

as per the first post on the line in question it's a smart hub supplied by BT when they upgraded from ADSL to VDSL

I thought that was your parents and you had a plusnet connection?