No I have fibre available and had it for many years Nomader.
My fibre speeds were around the 50 mark which was fine.
One day I thought I'd just try 4G to see what speeds I woulld get.
To my surprise I got 90-130 with three, all the other networks were pants, so as soon as my fibre contract was up, I got the first of about 6 Huawei routers.(So far)
CPE Pro 3 next?

Being a cheapskate, I was delighted, getting speeds of nearly double my fibre for a lot cheaper.
Unfortunately for me, three got slower and slower and I ended up with speeds of around 10-15 after around 18 months of my 2 year contract.
Due to over subscription I assumed.
I decided to cancel three and tried Vodafone, which was a little faster.
After a little while I thought I'd try three again via Smarty and speeds had improved a little to 30, so here I am, and quite happy with 30 as my 4K streaming works again.
Don't think I'll ever enter into a lengthy contract again as I always buy my mobile outright anyway and it always annoyed me the anual increase in price you get, so what's the point of a 12 or 18 months sim only contract?
So far I'm absolutely delighted with Smarty and intend to stay with it because as you know I'm getting a new three pole of wonder coming up soon, so hopefully that will improve things for me even more.
I'm moving my mobile contract over to Smarty too on Wednesday, so that will be handy.
Dear me what a long rant, sorry about that Nomader, but you did ask.