BT’s Complete Wi-Fi service gives you a guaranteed wi-fi signal in every room of your home, or £100 back.

For many people, a major frustration when using the internet at home is a poor wi-fi signal which leads to buffering, drop-outs and slow downloads. With wi-fi connected devices now being used across the whole home, it’s never been more important to make sure your wi-fi network covers your whole home.

BT’s Complete Wi-Fi service is designed to give customers a guaranteed wi-fi connection in every room of their home. The service combines a next-generation Smart Hub 2 router with up to three Wi-Fi Discs that all talk to each other using mesh networking technology. This is backed by the Complete Wi-Fi Guarantee, which gives you £100 back if you aren’t able to get download speeds of at least 10Mbps in every room of your home.

In this article, we’ll review BT’s Complete Wi-Fi service including the Smart Hub 2 router and the Wi-Fi Discs you’ll get included. We’ll also look at how wi-fi signal strength affects download speeds around the home, and how newer mesh networking solutions compare to traditional wi-fi repeaters or wi-fi range extenders.

What is BT Complete Wi-Fi?

In a typical home, the strength of your wi-fi signal drops very quickly as you move away from the router. The reduction in wi-fi signal strength is affected by numerous factors including your distance from the router, physical barriers like brick walls, and interference from other devices. This can lead to a poor wi-fi signal or rooms where you’re not able to get reliable wi-fi.

Normally, the quality of your internet experience depends very much on the strength of your wi-fi signal. For instance, a poor wi-fi signal can lead to dropped connections, buffering during online video and downloads taking a long time to complete. It can also worsen the battery life of your devices as they need to work a lot harder to maintain the wi-fi connection.

The Complete Wi-Fi Solution

BT Complete Wi-Fi is an exclusive service for BT Broadband customers in the UK, guaranteeing a wi-fi signal in every room of your home with download speeds of at least 10Mbps (more than enough for watching a HD-quality video stream). The solution consists of a BT Smart Hub 2 router, up to 3 Wi-Fi Discs and BT’s Complete Wi-Fi Guarantee.

The improved and stronger wi-fi signal you get when using Complete Wi-Fi should reduce buffering and dropped connections on devices that are further from your router (including laptops, tablets, smartphones, smart TVs, smart speakers and more).

It should also improve overall speeds. According to BT, a typical four-bedroom home will see a 25% increase in wi-fi speeds when using a single Wi-Fi Disc on the Complete Wi-Fi service. In some cases, however, it can be substantially more than this if you’re already suffering from poor wi-fi in certain rooms of your home.

Complete Wi-Fi Guarantee

The Smart Hub 2 and Wi-Fi Disc work together to give you a single wi-fi network across your home.

The Complete Wi-Fi Service is backed by BT’s Complete Wi-Fi Guarantee.

When you take out the service, you’ll be given a BT Smart Hub 2 and a single Wi-Fi Disc to get started. According to BT, this should already cover the majority of homes, but up to two additional discs are available free of charge if you need them. If, after three months, you’re still unable to get a wi-fi signal and download speeds of at least 10Mbps in every room of your home, a credit of £100 will be applied to your bill.

According to BT, the Complete Wi-Fi Guarantee “covers your main home” and “does not cover outbuildings, gardens or sheds”.

The closest alternative to BT’s Complete Wi-Fi service is the Broadband Boost service on Sky. For an extra £5/month, Sky’s Broadband Boost service guarantees a minimum speed of 3Mbps in every room of your home (slower than BT’s guaranteed 10Mbps minimum). You can also get a Wi-Fi Booster from Sky if one is needed, but this uses older Wi-Fi extender technology.

BT Complete Wi-Fi Deals & Plans

You can add the Complete Wi-Fi service to any BT fibre broadband plan for an extra £10/month. This means it’s possible to get BT’s entry-level fibre broadband plan with Complete Wi-Fi for £36.99/month.

The following table shows a list of the fibre broadband plans currently available from BT:

ServiceAverage SpeedContract LengthUpfront PriceMonthly Price
BT
Fibre Essential
36Mbps download24 month contract£10£36.99/month
with Complete Wi-Fi
BT
Fibre 1
50Mbps download24 month contract£0£37.99/month
with Complete Wi-Fi
BT
Fibre 2
67Mbps download24 month contract£0£41.99/month
with Complete Wi-Fi

View BT Broadband plans (bt.com) →

You’ll be given the option to add Complete Wi-Fi after choosing your fibre broadband plan on the BT site.

Over the course of a 24-month contract, it will cost £240 in total to add Complete Wi-Fi to your BT Broadband plan. This compares to a stand-alone cost of £200 to get a BT Smart Hub 2 with a single Wi-Fi Disc. The standalone option comes without a Wi-Fi Guarantee, and without the ability to get more Discs at no extra charge should they be needed in your home.

If you cancel the BT Complete Wi-Fi service, the Smart Hub 2 will remain your property. However, the Wi-Fi Discs will remain the property of BT unless you pay an additional £30 per disc to keep it.

BT Smart Hub 2 & Wi-Fi Disc Specifications

Both the Smart Hub 2 and Wi-Fi Disc support 802.11ac wi-fi, giving speeds of up to 1733Mbps.

The Complete Wi-Fi service comes with a Smart Hub 2 router and up to 3 Wi-Fi Discs that can all be managed through BT’s mobile application. You’ll also benefit from the BT Complete Wi-Fi Guarantee.

When opting for the Complete Wi-Fi service, you’ll receive the next-generation BT Smart Hub 2 router. The Smart Hub will plug in to your phone line, creating a wi-fi network from your fibre broadband connection. The second-generation Smart Hub supports dual-band Wi-Fi 5 technology (802.11ac) with speeds of up to 1733Mbps on 5GHz spectrum and up to 289Mbps on 2.4GHz spectrum. It uses 7 wi-fi antenna to optimise performance and speed on other devices. There are also four Gigabit Ethernet sockets for connecting wired devices to your network, and a USB port for connecting and sharing external storage. The Smart Hub 2 is also future-proofed for new technology, with support for DECT and BT’s Digital Voice service.

In addition to the Smart Hub 2 router, you’ll also receive a Wi-Fi Disc from BT (with two further Wi-Fi Discs being supplied at no extra charge should you need it). Each Wi-Fi Disc requires its own power connection, but apart from that, can be placed anywhere in your home. The disc communicates with your Smart Hub 2 to extend the range of your network and to boost the performance. Like the Smart Hub 2, it supports Wi-Fi 5 technology (802.11ac) with maximum speeds of 1733Mbps on 5GHz and 385Mbps on 2.4GHz. The Disc also has a Gigabit Ethernet socket for you to connect a wired device to your home network.

Both your Smart Hub 2 router and your linked Wi-Fi Discs can be managed through the My BT app. The app will also help you to set-up and optimise your wi-fi network.

Wi-Fi Signal Strength & Download Speeds

The wi-fi signal strength in your home is affected by numerous factors like walls and interference.

The strength of your wi-fi signal is a major determinant of the download speeds you’re able to get and the reliability of your broadband internet connection.

A poor wi-fi signal can lead to buffering and occasional pauses when you’re listening to music or watching video online. It can also cause slow downloads, dropped connections and poorer battery life on your devices.

Things that will affect your wi-fi signal strength include:

  • The distance between your device and the router/disc. The further away your device is from the router or disc it is trying to connect to, the weaker your wi-fi signal will be.
  • Physical barriers like walls and doors can block your wi-fi signal. Certain materials are notoriously bad for blocking your wi-fi connection such as insulated walls, concrete walls and metal roofs.
  • Interference from other devices and microwave sources. For instance, things like your microwave oven, Bluetooth-powered devices, cordless telephones and baby monitors can interfere with your wi-fi connection.
  • Interference from other neighbouring wi-fi networks. Your wi-fi network needs to compete against other neighbouring wi-fi networks for the same spectrum. This interference can reduce the speeds available on both networks.

Mathematically, the relationship between wi-fi signal strength and download speed is described by a formula called Shannon’s law. It probably isn’t that useful to understand all of the details of the formula. Rather, it’s just best to try and optimise the performance of your wi-fi network by placing your router in a central location and away from physical barriers and interference sources. Sometimes, however, your ability to do this will be limited by where the phone line enters your home. In larger homes, it’s often necessary to extend the range of your wi-fi network beyond what is available from a single access point or router.

Mesh Networking VS Wi-Fi Range Extender

BT’s Complete Wi-Fi uses mesh networking technology. This differs from many other solutions (especially those that are available on the high street) which use older range extender or wi-fi repeater technology.

The following table summarises the key differences between mesh networking and regular wi-fi range extenders or repeaters:

Mesh Wi-Fi Networking Wi-Fi Range Extender or Repeater
Mesh networking is a newer and more expensive technology. Historically, it’s been used in professionally wi-fi installations (e.g. in business and public locations). A traditional wi-fi repeater is a cheaper way to extend the range of your wi-fi network. It’s more easily available as an off-the-shelf product and is often used in home installations.
Mesh wi-fi networks give the maximum speed wherever you go, without any slowdowns in the connection. Speeds are normally slower when connected to a wi-fi extender or repeater (typically about half the speed).
Your device will always connect to the nearest node in a mesh network, giving the fastest available speeds at all times. The nodes combine to form a single network. You may need to manually change the wi-fi network on your device to get the best speeds as you move around your home. Extenders create a separate wi-fi network.
Typically a more expensive solution, but now becoming more easily accessible to consumers. Easier to purchase (e.g. on the high street), and typically a bit cheaper than mesh technology.

Where possible, we’d recommend using mesh networking technology. There are several key advantages of using mesh technology over a simple range extender or repeater:

  • Mesh wi-fi networks give you faster speeds. Older wi-fi range extenders communicate with your wi-fi router and re-broadcast the signal as a new network. As the extender needs to receive and broadcast a signal at the same time, the amount of bandwidth available on it is drastically reduced. This leads to a slower connection when you’re using the repeater. The additional congestion from having a separate network from the repeater can also reduce download speeds further. With a mesh network, this doesn’t happen and you won’t get the slowdown of using a repeater.
  • You don’t need to juggle around with having multiple wi-fi networks. With mesh networking, you’ll get a single combined wi-fi network and your devices will always connect to the nearest node at all times. This gives you the maximum available download speed and performance. With wi-fi range extenders or repeaters, you’ll have multiple wi-fi networks for different parts of your home (e.g. one network upstairs and another one downstairs). Once you’re connected to either network, your device will stay connected to that network until it loses coverage entirely (e.g. it could stay connected to the weaker upstairs network whilst you’re downstairs). This means manual intervention is often required to ensure you’re always connected to the strongest wi-fi network at all times.
  • There’s just one network name and password for your entire home. This greatly simplifies the set-up of wi-fi on your devices. With a wi-fi repeater or range extender, you’ll need to set up multiple wi-fi networks on every device you use (each one with a different network name and password).
  • There’s no need to have a wired connection between extenders. To avoid a slowdown in connection speed, some people use a wired connection from their router to their wi-fi repeater or range extender. This isn’t necessary when using mesh networking technology.
  • It’s easier to set-up a mesh wi-fi network. In general, it’s much easier to set-up a mesh wi-fi network, especially when you have multiple extenders. Most wi-fi range extenders and repeaters require more manual configuration.

Complete Wi-Fi is BT’s second mesh networking solution. Their first one launched in 2017 and was known as Whole Home Wi-Fi. The Complete Wi-Fi solution differs from Whole Home Wi-Fi in that your Smart Hub 2 is an integral part of the mesh network. Therefore, using Complete Wi-Fi with a single Wi-Fi Disc is equivalent to using Whole Home Wi-Fi with two discs.

Frequently Asked Questions

What is BT Complete Wi-Fi?
BT Complete Wi-Fi is an optional add-on for BT’s fibre broadband service in the UK. It gives you a guaranteed wi-fi connection with speeds of at least 10Mbps in every room of your home. You’ll get a Smart Hub 2 router and up to 3 Wi-Fi Discs.
How does BT Wi-Fi in every room work?
BT’s Complete Wi-Fi uses mesh networking technology to extend the range of your Wi-Fi network across your whole home. The BT Smart Hub 2 router links up with your Wi-Fi Discs to form a single wi-fi network that covers every room of your home.
What is the Complete Wi-Fi Guarantee?
BT guarantees a minimum download speed of at least 10Mbps in every room of your home. If you’re unable to get this minimum download speed in every room of your home, you’ll get £100 in credit once you’ve been using the service for 3 months.
How many discs do I get with BT Complete Wi-Fi?
To start with, you’ll get 1 Wi-Fi Disc provided on the Complete Wi-Fi service. If further discs are needed, you can get another 2 discs sent out to you at no additional charge.
How much does BT Complete Wi-Fi cost?
You can add the Complete Wi-Fi service to any BT fibre broadband plan for an extra £10/month. At present, you can get fibre broadband with the Complete Wi-Fi service from £36.99/month.

More Information

For more information about the Complete Wi-Fi service, please see BT’s official website.

Your Comments 24 so far

We'd love to hear your thoughts and any questions you may have. So far, we've received 24 comments from readers. You can add your own comment here.

  • Ray ruzewicz said:

    I have the Smart hub 2 and 3 discs. However I still get poor wifi / dead spots my house is Georgian G2 with very thick walls.
    Can I use a BT repeater within this set up to enhance reception.
    Can I add BT have been less than helpful.

    • Hi Ray,
      Great question. I assume you’ve already had your money back from BT as part of the Complete Wi-Fi package? If so, I believe you can still order additional discs through this page at a cost of £100 each.
      Ken

  • My tests today have shown me that the WiFi discs seem to be working like conventional extenders with a speed drop rather than the claimed no speed drop with a true mesh network.
    Setup one disc directly inline between the Smart hub 2 and bottom of my garden through an open window.
    Using the BT app to setup the disc was placed in an “excellent” location according to the app.
    Speed test connected via the disc returned speeds in the high 50’s.
    Went back in the house and switched off the power to the disc and returned to the same location down the garden and did another speed test, now connected directly to the Smart hub 2 at the opposite side of our house through 2 walls and the open window.
    The signal strength on my phone was showing as being less than when connected to the disc as expected, however the speed test was now returning faster speeds in the mid to late 90’s.
    Just for reference I get mid 130’s at close proximity to the Smart hub 2.
    Surely if this system is working as the mesh network that it’s advertised as being, when connected to the disc I should be getting the same mid to late 90’s or higher that I get when connected directly to the Smart hub 2 through some additional walls.
    Anyone have a reasonable explanation for my findings?
    Thanks in advance.

  • Damien McKeand said:

    Great website Ken!
    Really useful information. I have just upgraded to the BT 900 deal. I was told by a friend that the 500 deal was pulled by BT in order to get people to buy the 900.
    Well I phoned (27/6/20) them to sort out a deal but they had all the speeds available, 100, 300, 500, 900.
    They are however pushing the 900 deal in that it was cheaper than the 500!
    So, my bundle is: 900 full fibre plus the Complete Wi-Fi service for £56.99!!! Amazing deal.
    The BT guy I spoke to reminded me to make sure I get all 3 discs from BT as the 2nd 2 are free as you said in your article.

    • Hi Stuart,
      Thanks for your comment. I don’t think BT publish any information on the expected range of their discs. However, I believe you can normally get up to 30 meters of range on similar products.
      Ken

  • Great website and article. I agree on using a Mesh versus an Extender. Can you advise on whether a Powerline system, or Mesh network is better though?
    1. In terms of having multiple networks, a Powerline can use the same network SSID, but does it have the same issue where e.g. you will be connected to the main ISP Router as you walk through your house, and then suddenly the connection would go even if the Powerline Wifi overlaps the middle of the house?
    2. Would the Mesh Wifi give you a faster Wifi than the Powerline distributer/node that is plugged into a wall theoretically dispersing the “full” bandwidth from your router?
    3. Allowing for going through a few walls, hypothetically in the case of Full Fibre (e.g. speeds of 330 to 1000), would the Mesh, or Powerline solution be able to deliver as close as possible Wifi speeds equivalent to the Full speed? I notice that the BT package for instance only seems to mention a guarantee of 30Mbps, which seems extremely low for such a high speed?

    Thus far I have used a Powerline for very slow ADSL service (1-3Mbps), and noticed it disperses virtually full signal when it works (which constantly goes because of the copper line) on the extreme ends of the house (the ISP router and Powerline are on opposite ends, one upstairs, one downstairs), though the middle of the house, or far corner upstairs can have a lower Wifi signal.

    Been using 4G this whole time to survive, but incredibly FTTP “up to 1000” has now become available at the property, so very interested to know the best way to distribute a solid Wifi signal to maximise the speed throughout the house and keep it simple?

    • Hi Stanley,
      Thanks a lot for your comment, and for the kind words about the website!
      With regards to 1: I believe your device would automatically connect to the router with a stronger signal if both routers are using the same SSID. Of course, though, you’ll need to configure your routers to work together properly with each other (slightly easier with mesh as that’s how it’s always designed to work).
      With regards to 2 & 3 (whether mesh or powerline is better), it’s really difficult to give a precise answer for this! Ideally, you would always use a wired Ethernet connection through your home if possible – especially if you want to benefit from full gigabit speeds. However, mesh is normally a decent alternative if you don’t want to go to all of this hassle, though speeds won’t be quite as good as using a wired connection. I think the quality of powerline really depends on how your house is wired up: it might work great for some people and really badly for others! From the two, I’d personally try out using mesh wi-fi first given it’s a newer technology, tends to be more flexible, probably offers better speeds for most people, etc. Saying that, if you already have a powerline network set up, you may as well test this out first before purchasing some new kit to try the mesh networking solution.
      Hope this helps,
      Ken

      • Hi Ken,
        Thanks! And this website is awesome. That helps.
        I actually use a Powerline system with Wifi at the moment. I’m wondering how to best disperse the FTTP that has become available (waiting to see what will be on offer after March).
        I came across a Powerline Mesh Wifi network as well, which I suppose would combine the best of both worlds? Be great to see a review or recommendations on that. I saw the Devolo Powerline Magic Mesh Wifi system for instance. Would something like that (I think TP Link and Huawei also do such Powerline Mesh Wifi units) be better than a purely Wifi mesh system like Google Wifi?
        Keep up the great site,
        Stanley

  • Most bog standard routers will reach every normal size house.. Its a con we gaurentee every room. Any generic router will do that..

    • If you live in a bedsit i agree but I’ve never lived anywhere where I get full coverage in every room. In fact I can be 10 meters away from my router with no walls or doors in the way and I just get buffering.

  • We’re about to order Fibre 250, with BT Complete Wi-Fi. The most convenient place to bring fibre into the house is at one end (nearest the road). However the house is long so normal wi-fi won’t reach and I’ve already been looking at mesh systems. Am I right in thinking that with a spread of discs, the mesh system means that it doesn’t really matter where the original line comes into the house?

    • Hi Gill,
      Thanks for your comment. Yes, with mesh wi-fi there shouldn’t be much impact from where the original line comes in to the home. There might still be a small difference as traffic from the other end of the home needs to “hop” through more discs before reaching the actual router. However, I imagine this should be fairly minor/negligible.
      Ken

  • No u are not the only one to deliver WiFi in every room, stop lying, and don’t try to say about terms and conditions, because u always say, ur fake

  • Hi I used to have BT Whole home and we positioned disks to bounce the wifi through a window to an annex which has a seperate electric circuit
    It worked fine albeit not huge speeds.

    I have now upgraded to Smart Hub 2 and am not getting anything in the annex – i have smart hub 2 + 3 disks do the disks need to be on the same electric circuit? how do they talk to each other – do they need to point through glass to bounce off each other?

    • Hi Ronnie,
      Thanks for your comment. The Whole Home Wi-Fi uses mesh networking technology so the discs will communicate wirelessly with each other. There’s no need for them to be on the same electrical circuit. Unfortunately, it’s really difficult for me to say what the issue is here (e.g. it might be a configuration issue on the Smart Hub, or perhaps something else may have changed in the set-up of your Whole Home Wi-Fi system)?
      Ken

  • Mark Pearson said:

    Hi,

    I have installed a new router and a single disc but am still getting complaints about poor wifi around the house? Is there an app I can use to show the single strength at any point in the house to check before getting more discs?

    Many thanks
    Mark

  • I am about to get a smart hub 2 with discs but is says no guarantee for out buildings. Can you use an extender as well in combination with the disc system. An extender system currently works with my BThub6 and gets signal albeit at lower speed in my stables some 30m or so away

    • Hi Lisa,
      Thanks for your comment. Yes, I believe it should be possible to use an extender in combination with the Smart Hub 2 and Complete Wi-Fi Discs. However, it sounds like this might be a fairly complex set-up. How far away is the outbuilding that you’d like to cover? It might be best to look at an alternative mesh networking solution instead (e.g. BT’s Whole Home Wi-Fi), or having a wired connection to your outbuilding when then terminates in another disc/hub.
      Ken

  • I like the sound of enhacing the wi-fi in the home and the BT complete service with the mesh networking, sounds great. Does the router have a SIM card slot? Or, is it just for wired broadband connections?
    I suspect, as its not mentioned, there won’t be a SIM card slot and is therefore of no use to me in our situation. We receive poor download speeds (typically 3-5 Mbps) due to our old copper wiring and country location and are challenged internally by thick stone walls which make wi-fi hit or miss.
    We do however receive upwards of 30 Mbps by 4G. so I am exploring the possibility of purchasing my own home 4G router with a SIM card slot and adding an unlimited SIM deal.
    I would therefore like to find out what home routers with a SIM slot might be as good as this BT one sounds, with mesh networking if possible. Any ideas?
    Thank you.

    • Hi Carolyn,
      Thanks for your comment. The BT Complete Wi-Fi solution consists of a fibre broadband router with built-in mesh networking functionality. If you’d like 4G broadband with mesh networking, you’re best off having two separate products. Use the 4G router from your 4G home broadband provider in conjunction with BT’s Whole Home Wi-Fi solution (or an alternative mesh networking product like Google Wi-Fi). Whole Home Wi-Fi works in conjunction with your existing router, creating a mesh wi-fi network from it.
      Hope this helps,
      Ken

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