This topic

Slow Wifi

Tonyjones1985 — Mon, 19 May 2025 15:46:27 GMT

Good day all.

we went full fibre last month and ever since the WiFi speeds have tanked. We are getting lower network speeds then when we was on copper. BTs helpline have said everything is fine but can’t explain to me why speeds are lower.

running smart hub 2 on a 150mb package but WiFi is ~15mb and was getting >70 on the copper.

any thoughts very much welcome.

Re: Slow Wifi

WSH — Mon, 19 May 2025 16:24:29 GMT

The 70 on the copper, (I take it you mean ethernet?), sounds like either the interface on the device is only 100Mb, (it would have to be an old device for that) or there is a problem with the cable. It requires all 8 wires to be connected at gigabit speeds. Only cat 5e, (not cat 5), and above will do that and even then, all 8 connections have to be working. Try a different cable. It could also be a problem with the auto-negotiation. Again, unplugging and reattaching the cable should fix that.

Wi-Fi has always been a bag of pants. In its case it could be the hub is in a different position, the new hub is using a different channel, that is picking up more interference etc. The device has connected on 5GHz instead 2.4GHz, so the speed has dropped etc. Unfortunately, there are so many things that can affect Wi-Fi, it is difficult to say.

Re: Slow Wifi

Tonyjones1985 — Mon, 19 May 2025 17:46:07 GMT

By copper I mean not full fibre. Nothing in the flat has changed other than the source of the internet, ie fibre (copper) to full fibre (optical)

Re: Slow Wifi

licquorice — Mon, 19 May 2025 17:49:50 GMT

Try changing WiFi channel.

Re: Slow Wifi

Tonyjones1985 — Mon, 19 May 2025 18:56:07 GMT

Tried all this. Also just tried it again and kept booting my iPhone off of network.

none of the settings were changed, just the source and WiFi speeds tanked.

Re: Slow Wifi

Tonyjones1985 — Tue, 20 May 2025 06:18:45 GMT

By copper I mean not full fibre. Nothing in the flat has changed other than the source of the internet, ie fibre (copper) to full fibre (optical)

Before full fibre

after full fibre.

Re: Slow Wifi

Rach_H — Tue, 20 May 2025 09:30:24 GMT

Hi @Tonyjones1985,

Welcome to the Community!

I'm sorry to hear you're having issues with your speeds. What are your speeds like when you have a wired connection?

Rach

Re: Slow Wifi

Tonyjones1985 — Tue, 20 May 2025 10:22:07 GMT

Hi there. Topping out on Xbox at 150 and that’s to be expected as that’s the package we pay for.

Re: Slow Wifi

Rach_H — Tue, 20 May 2025 15:13:35 GMT

Thanks for letting me know @Tonyjones1985. Have you spoken with our Technical team about the trouble you've been having?

Rach

Re: Slow Wifi

Tonyjones1985 — Tue, 20 May 2025 15:30:23 GMT

I have yes. They said everything looks fine and settings look fine. I know the settings are fine as they are the same settings from when we was getting 70mb before the fibre install.

my next step is to get a third party router.

Re: Slow Wifi

Hooba — Tue, 20 May 2025 16:36:03 GMT

The 'after full fibre' speed test suggests your iPhone not connected to wifi - but 5G mobile signal instead?

Re: Slow Wifi

licquorice — Tue, 20 May 2025 16:54:48 GMT

Well spotted.

Re: Slow Wifi

WSH — Tue, 20 May 2025 17:06:01 GMT

Yes, quite so.

Re: Slow Wifi

Tonyjones1985 — Tue, 20 May 2025 17:11:25 GMT

Oh yea. That’s after I turned 5ghz back on and it kept booting me off. This is back with 2.4

Re: Slow Wifi

Tonyjones1985 — Fri, 30 May 2025 15:09:45 GMT

BT “smart hub” WiFi turned off and new TP link hub installed, that’s much better.