topic Re: Speed Gone from 955MBS to 173MBS in a Few Weeks in Full Fibre

Speed Gone from 955MBS to 173MBS in a Few Weeks

UnluckyAlf — Tue, 10 Feb 2026 17:12:31 GMT

We moved from Sky because of cost, poor customer services and slow speeds. We opted for FFTP and pay for the 900mb package with, quote:-

Full Fibre broadband

Our fastest ever speeds up to 900Mb with rock-solid reliability

Yet as the screenshot shows, not so fast or rock solid.

Good start but now taking the micky.

Re: Speed Gone from 955MBS to 173MBS in a Few Weeks

jab1 — Tue, 10 Feb 2026 17:20:04 GMT

@UnluckyAlf Report a fault via: https://www.plus.net/help/report-a-problem/

Re: Speed Gone from 955MBS to 173MBS in a Few Weeks

MisterW — Tue, 10 Feb 2026 17:25:40 GMT

@UnluckyAlf are those wireless tests ?

Are you able to do a wired test direct to the router ?

Re: Speed Gone from 955MBS to 173MBS in a Few Weeks

UnluckyAlf — Tue, 10 Feb 2026 17:58:38 GMT

Hi, unfortunately not. I’ve a box of random cables but I don’t even know i USB C to Ethernet is possible. Thanks anyway.

Re: Speed Gone from 955MBS to 173MBS in a Few Weeks

RealAleMadrid — Tue, 10 Feb 2026 18:20:39 GMT

@UnluckyAlf In that case you must realise that your wi-fi speed tests are meaningless, A wi-fi speed can vary greatly and no ISP will guarantee full speed on a wireless connection.

Re: Speed Gone from 955MBS to 173MBS in a Few Weeks

markhawkin — Tue, 10 Feb 2026 18:24:54 GMT

It's not a connection fault it's a wireless issue.

At a guess the device has roamed from the 5GHz wireless to 2.4GHz or something in the wireless enviromment (neighbour got a new router etc.) has changed.

It looks like an Android device so WiFiMan ( https://wifiman.com/ ) would be worth trying as a diagnosis tool.

With a cabled connection I'm sure your connection speed will be as contracted.

Re: Speed Gone from 955MBS to 173MBS in a Few Weeks

UnluckyAlf — Tue, 10 Feb 2026 18:26:05 GMT

OK but the Deco Mesh thing is directly wired to the router and all those pictured speeds are from the WiFi via Deco. Also, when you say I must understand, I don’t because I’m not an IT expert 😂

Re: Speed Gone from 955MBS to 173MBS in a Few Weeks

MisterW — Tue, 10 Feb 2026 18:31:26 GMT

@UnluckyAlf

but I don’t even know i USB C to Ethernet is possible

its possible, I've got one and it does work on Android

However , my guess would be the same as @markhawkin , check that you're still connected to the 5ghz band

Edit: OK but the Deco Mesh thing i

So theres a Deco mesh in the equation as well ?

Re: Speed Gone from 955MBS to 173MBS in a Few Weeks

jab1 — Tue, 10 Feb 2026 18:29:09 GMT

@UnluckyAlf If you only have a phone, why are you paying for a speed you will never need? I appreciate this doesn't help, but it is a question I've wanted to ask many like you.

Re: Speed Gone from 955MBS to 173MBS in a Few Weeks

UnluckyAlf — Tue, 10 Feb 2026 20:00:24 GMT

Happy to answer = An iPhone, iPad, Galaxy Tab, Samsung phones (work and home) iMac (upstairs) plus Apple TV (box and service) has replaced Sky. Partner often works from home and I’m retired so don’t want to compete with her for bandwidth. Nothing other than the TP Deco is directly connected to the router. At last count, there were 16 clients on WiFi.

Re: Speed Gone from 955MBS to 173MBS in a Few Weeks

UnluckyAlf — Tue, 10 Feb 2026 20:02:25 GMT

Hi it’s Apple iOS so do you know if there’s an alternative to the Android tool please?

Re: Speed Gone from 955MBS to 173MBS in a Few Weeks

beeceegee — Tue, 10 Feb 2026 20:36:20 GMT

Your Deco may have an inbuilt speed tester. In the Deco app look for "Test Internet Speed" on the "Network" page. It will give a better idea of your line speed than tests run from connected devices. Try to ensure nothing else running when testing

Re: Speed Gone from 955MBS to 173MBS in a Few Weeks

UnluckyAlf — Tue, 10 Feb 2026 20:58:11 GMT

Hi, the Deco app seems to monitor speeds in real time.

Re: Speed Gone from 955MBS to 173MBS in a Few Weeks

beeceegee — Tue, 10 Feb 2026 21:16:14 GMT

Hmm, no option to run a one off test? Google suggests newer Decos may have the standard Ookla Speedtest built in. If it's anything like my Asus router this is in addition to any real time monitoring

Re: Speed Gone from 955MBS to 173MBS in a Few Weeks

UnluckyAlf — Tue, 10 Feb 2026 21:27:00 GMT

Thank you. I’ll try to dig deeper tomorrow.

Re: Speed Gone from 955MBS to 173MBS in a Few Weeks

Dan_the_Van — Wed, 11 Feb 2026 07:39:11 GMT

@UnluckyAlf

Which mode are you using the Deco mesh, Wireless router mode or Access Point Mode?

The TP-Link tether app might list what devices are connected to which band 2,4 or 5 GHz.

Only the devices connected to 5 GHz would be the ones can achieve the higher speeds, those devices would also need to be connected to the primary node if the backhaul between the nodes is wireless.

This app Android version is handy https://techet.net/netanalyzer see link for features.

Re: Speed Gone from 955MBS to 173MBS in a Few Weeks

markhawkin — Wed, 11 Feb 2026 09:29:29 GMT

While there is a WiFiman for Apple devices it doesn't have the useful channel display (I guess because the raw data isn't available on iOS) and I'm afraid I don't know of an iOS alternative.

The Deco adds a complexity to the mix.

This thread from another user with Deco (and some speed limitations) is worth a read.

https://community.plus.net/t5/My-Router/Setting-up-hub2-on-Full-Fibre-900-with-Deco-M5/td-p/1984775

I would give the approach in post 2 a go (plug the Deco directly into the ONT).

The other insight I've gained from that thread is that the Deco is a mesh but there is no "backhaull" for the mesh indipendent of the channels used by the devices.

I wonder if your original tests were connected to the cabled Deco and the more recent ones (for some reason) on the satellite devices and thus using two wireless hops.

One of the reasons I've not gone down the mesh route is that there seems to be a degree of "witchcraft" to it!

Re: Speed Gone from 955MBS to 173MBS in a Few Weeks

UnluckyAlf — Wed, 11 Feb 2026 10:29:39 GMT

Good morning Dan, and everyone trying to help. Many of the phrases and concepts involved in this are way beyond me, for example, I’ve no understanding of what a backhaul is or what it does, Ookla I’m guessing is a program or something? Anyway, mention of the TP Tether app reminded me I came to the Deco mesh via basic TP Link extenders (2 in the house, 1 for a printer and 1 for a music streamer. Having checked the Tether app they are both on 2.5/5 connections and so I’ve stopped them from connecting to 2.5 (I think) I found a similar option in the Deco but the Panasonic TV says it can’t connect now so I’m guessing some items can only use 2.5 and disabling it has caused problems for them. In the Deco app they help page for testing speed says the app only shows this feature when certain models of deco are set as the main one. My Deco X50 isn’t one of them.

Now, I’m at a point where I have no clue what I’m doing. All I know is the Deco was bought and installed at the same we moved from Sky copper to Plusnet FFTP and we were getting the promised speeds with the out of the box setup for both. No one and no item, has ever connected directly to the Plusnet router from day 1. So I don’t see what else a basic normal user, with my limits skills can do, but again, than as to all for trying to help.

Re: Speed Gone from 955MBS to 173MBS in a Few Weeks

pvmb — Wed, 11 Feb 2026 10:35:46 GMT

@beeceegee wrote:

Hmm, no option to run a one off test? Google suggests newer Decos may have the standard Ookla Speedtest built in. If it's anything like my Asus router this is in addition to any real time monitoring

Thinks: Since this matter of "My broadband/Wi-Fi speed is not up to that contracted" is a recurring issue on here and given that the BT Wholesale Broadband Performance Test is no more, it would be generally useful if any future update to the Hub 2 firmware included a new link for a replacement Broadband(!) Speed Test.

Re: Speed Gone from 955MBS to 173MBS in a Few Weeks

UnluckyAlf — Wed, 11 Feb 2026 10:37:59 GMT

Thank you for this info Mark. I’ll google the phrases I don’t know but I do know disabling the 2.5 thing has knocked 3 older Ring cameras off the WiFi and now only 2 of the 5 cameras are online. I honestly think I’m done with this as I don’t know what I’m doing and seem to be creating more problems than I’m solving. I do know the old router wan’t enough and my partner had problems with Teams etc so I thumbs we do need a mesh to get coverage all over the house (only a small semi btw but even so).

I’ll step away from this now and go walk yes dog before I’m tempted to take all the kit outside to ‘fix’ it with my sledgehammer 🙂