This topic has been discussed before but mine is slightly different so I thought I would ask here in the hope of an answer.

Got this particular router from Spark when I signed up for Fibre.  And have had 5 months of trouble with it.  I have noticed faster downloading but more dropouts than ever.

Have a very long house so we have a switch (I think)  and off of that everything else goes off round the house.  Ethernet mainly.

Have Wifi to our Sony smart TV (6 years old) and it is at the farthest point from the New Huawei which is in the garage.  Have an old dlink which works a treat set up as a bridge? repeater?  (not sure of the term) but it ensures we get wireless down the other end of the house.

The Bravia TV is about 3 -4 metres and 1 wall away and usually doesn't have much problem connecting with the D Link.

Now:  TV aside which doesn't connect to Huawei directly, we have had problems several evenings a week with devices being unable to pick up the Huawei signal despite the devices being located 3 or 4 metres away through a wall.

Spark says the problems are due to devices not the router but: 

New Apple Imac close by doesn't consistently receive signal but can get the signal relayed from the old DLink fairly consistently several rooms away

3 yr old Xiaomi Mipad shows strong signal from 4 meters away but nothing downloads 0 - 2 kbs??  not sure of measurement and lack of Wan can go on for 1/2 a day at a time.  Happens most days. 

Newish Microsoft Surface has no problems from anywhere in the house, neither does 3 yr old xiaomi miphone.  Although on 2 occasions down the far end of the house the signal to the Surface has dropped out completely.

HP desktop 5 meters and a wall away is spotty.

The Sony Bravia shows the Huawei with very strong signal but even in the same room will not connect with it.

The problem is mainly in the early to mid evening but can occur any time.

I have changed the channels a couple of times but no difference is found.  Don't think it is the old D link as everything works off it and for quite a distance.

I nothing about networking and LANs etc.

But we have been reduced to mirroring Netflix on the TV using Bravia's ? Bluetooth?  Whatever.

So my assessment, the router is not good.... the last Huawei one wasn't great either but this is a lot worse.

Specific questions - Why will the Huawei not send to the TV when it is picking it up as having a strong signal?  Could the TV be configured wrong or need a software update?

The Huawei is across the garage from the energy company smart meter, do you think they are interfering with each other?

Do you think it has anything to do with the switch?  That's probably 5 or 6 years old.  

I tried a plug in booster repeater amplifier thing and it made no difference.

Also can someone tell me, should the primary and secondary DNS in my Bravia be the same addresses as in my router?  

At one stage, the TV said I should put in a static route (I assume this is like a fixed IP address?).  If so, what address would this be - where would I find it and would it mean I couldn't easily switch between the D link and Huawei whenever the signal wanes?

Any help at all would be great.

N