The Huawei AI Cube on Three offers unlimited 4G home broadband with a built-in Amazon Alexa speaker for £25/month.

Three is currently offering a Huawei AI Cube B900 router with unlimited data for £25/month. The router, which also doubles up as an Amazon Alexa smart speaker, gives you high-speed 4G broadband on up to 64 devices. This is delivered without the need for a phone line or cable, making it a possible alternative for fixed home broadband.

In this article, we’ll review the Huawei AI Cube B900 router from Three, including the price plans available and the capabilities of the device. We’ll also compare it to alternative devices like the HomeFi router from Three which costs only £22/month.

AI Cube Price Plans

For many people, 4G technology now provides a viable alternative to fixed home broadband that’s delivered through a phone line or cable. As it uses 4G mobile network technology, you’ll get a high-speed broadband service that isn’t limited by the speeds you can get through a phone line or cable. You can also get your broadband connection set up quickly without an engineer visit, and there’s the flexibility to bring your broadband connection with you to other places.

At present, Three offers a choice of two 4G-powered home broadband routers: the HomeFi B311 router which costs £22/month and the AI Cube B900 which costs £25/month.

As the more expensive of the two devices, the AI Cube B900 supports higher download speeds on 4G (up to 300Mbit/s rather than 150Mbit/s). It also supports dual-band Wi-Fi and doubles up as an Amazon Alexa smart speaker. This means you can use the AI Cube to control smart home devices and for listening to music.

The Huawei AI Cube B900 is available on two price plans at present. There’s an unlimited data plan costing £25/month on a 24-month contract. Alternatively, a shorter 12-month plan is also available costing £30/month with a £29 upfront fee:

Data Allowance Contract Length Upfront Price Monthly Price
Unlimited Data 24 month contract £0.00 £25/month
Unlimited Data 12 month contract £29.00 £30/month

The AI Cube is also available on a range of Pay As You Go plans from £210.

See all Three AI Cube Deals →

If you replace your fixed line broadband connection with a AI Cube router, it may be possible to cancel your landline connection. This can save you around £20/month, offsetting much of the cost of getting an AI Cube router. You’ll need to find an alternative way to make phone calls if you do this (e.g. using your mobile phone instead of a landline, or making internet-based phone calls using your AI Cube).

Huawei AI Cube B900

The Huawei AI Cube B900 is Three’s higher-end 4G home broadband router. The router supports Category 6 LTE speeds (up to 300Mbit/s download and 50Mbit/s upload). However, most users will get a more realistic download speed of around 30Mbit/s depending on location. The AI Cube’s home broadband service can be shared with up to 64 devices at any given time using the dual-band wi-fi connection. There’s also an Ethernet socket for connecting a wired device to your network.

In addition to working as a 4G router, the AI Cube also doubles up as a smart speaker solution. It has four built-in microphones with far-field voice recognition and a 360° speaker. This means you can use it in the same way as you would an Amazon Echo (for instance, to control your smart home devices, to make internet-based phone calls and to listen to music through online steaming services). The AI Cube’s interface allows you to control everything by voice, simply by asking Alexa to do something for you.

In our opinion, there are some major benefits to choosing the AI Cube over the regular HomeFi router. For starters, you’ll get Category 6 LTE support giving maximum download speeds of up to 300Mbit/s (this compares to 150Mbit/s on the HomeFi). You’ll also get dual-band wi-fi support (including 802.11ac wi-fi at 5GHz) and the ability to connect up to 64 devices at one time. Combine this with the Alexa-powered smart speaker and you’re getting quite a lot more for your extra £3/month.

The AI Cube can be used to control your home and to listen to music, in addition to being a router.

On the other hand, being a 2-in-1 device, there are some trade-offs to be made in the AI Cube’s design. For instance, the optimal location to place a smart speaker in your home is normally fairly centrally in the living room. This may sometimes differ from the optimal location for a 4G router which is often closer to a window sill (this is to maximise the signal strength of your 4G connection). The AI Cube also lacks support for an external SMA antenna, meaning this option isn’t available to you for improving the coverage on your device.

For customers living in an urban area with fairly good mobile coverage, the trade-offs required to use an AI Cube are probably fairly small (you can benefit from faster speeds and the Alexa capabilities, and you probably didn’t need to use the external antenna capabilities anyway). However, for customers living in a rural area with much poorer coverage, the traditional router will probably be a much safer bet.

The following table shows a side-by-side comparison of the AI Cube B900 and the HomeFi B311:

Huawei AI Cube B900 Huawei HomeFi B311
Mobile Connectivity
4G Speeds: Up to 300Mbit/s download
(Category 6 LTE)
Up to 150Mbit/s download
(Category 4 LTE)
4G Bands: LTE Bands 1, 3, 7, 8, 20, 32 & 38 LTE Bands 1, 3, 7, 8 & 20
External Antenna Connector: No Yes, external SMA antenna
Home Network Connectivity
Wi-Fi Connectivity: 802.11a/b/g/n/ac
(2.4GHz & 5GHz dual-band)
(2.4GHz only)
Wi-Fi Devices: Up to 64 devices Up to 32 devices
Ethernet: 1 Gigabit Ethernet port 1 Gigabit Ethernet port
Other Features: 360° smart speaker with Amazon Alexa
Price: £25/month for unlimited data £22/month for unlimited data

You can see the full specifications for Huawei’s AI Cube B900 on Three’s website.

As an alternative to both of the above, you can also consider buying a separate, unlocked router. For instance, the Huawei B525 router is available for around £120. Like the AI Cube, it supports Category 6 LTE speeds (up to 300Mbit/s download speeds) and dual-band 802.11ac wi-fi on up to 64 devices. It also has 4 Gigabit Ethernet sockets, a RJ11 telephone socket and a SMA socket for you to connect an external antenna to the router. This can be combined with an unlimited data SIM card from Three, giving the best of both worlds (higher download speeds without needing to compromise on coverage).

You can combine the Huawei B525 router with something like a standalone Amazon Echo speaker. This is available for about £90. A standalone Amazon Echo can be placed anywhere in your home: it isn’t necessary to balance this against where you’ll get the best 4G network coverage.


The closest alternative to an AI Cube is Three’s regular HomeFi service. This costs £22/month with unlimited data. The HomeFi can also be purchased on a range of shorter price plans, and can be used on a Pay As You Go basis.

The following table shows a list of available price plans for the HomeFi:

Data Allowance Contract Length Upfront Price Monthly Price
Unlimited Data 24 month contract £0.00 £22/month
1GB Data (1 month validity) Pay As You Go £59.99 Top-up as required*
3GB Data (3 month validity) Pay As You Go £65.99 Top-up as required*
12GB Data (12 month validity) Pay As You Go £89.99 Top-up as required*
24GB Data (24 month validity) Pay As You Go £109.99 Top-up as required*

* Customers with a HomeFi on Pay As You Go can use the Data Reward plan. This offers 200MB of free data per month, with further usage costing 1p/MB.

For more information, please read our in-depth review of the HomeFi service or see the HomeFi on Three’s website.

Other Mobile Networks

If you’d like to look at 4G-powered home broadband solutions from other mobile networks, you can also consider the 4GEE Home Router or Vodafone’s GigaCube.

EE offers an Alcatel produced 4G Home Router from £35/month on an 18-month contract. However, this only includes 50GB of data on the most basic price plan, whereas most users will want to choose a plan with around 100GB or 200GB of data per month. This is likely to cost you substantially more (in the region of £45 to £50 per month):

Data Allowance Contract Length Upfront Price Monthly Price
50GB Data 18 month contract £0.00 £35/month
100GB Data 18 month contract £0.00 £45/month
200GB Data 18 month contract £0.00 £50/month
300GB Data 18 month contract £0.00 £80/month
500GB Data 18 month contract £0.00 £100/month

For more information, read our full review of EE’s 4G home broadband service or visit the EE website.

Meanwhile, Vodafone’s GigaCube service comes with a Huawei B528 router. This has a similar cylindrical design to the AI Cube B900 router but it lacks the Amazon Alexa smart speaker capabilities. It is also restricted to only supporting up to 20 devices at a given time, whereas the AI Cube allows you to connect up to 64 devices.

The GigaCube is available from £35/month on an 18-month contract:

Data Allowance Contract Length Upfront Price Monthly Price*
60GB Data 18 month contract £0.00 £35/month
60GB Data 1 month contract £120.00 £35/month
100GB Data 18 month contract £0.00 £45/month
100GB Data 1 month contract £120.00 £45/month
200GB Data 18 month contract £0.00 £60/month
200GB Data 1 month contract £120.00 £60/month
300GB Data 18 month contract £0.00 £80/month
300GB Data 1 month contract £120.00 £80/month

For more information, read our full review of the Vodafone GigaCube or see Vodafone’s official website.


Three offers 99.8% population coverage on its 4G network and 98.3% population coverage on its 3G network.

Before purchasing an AI Cube on Three, it’s strongly recommended that you check the coverage in your area. You can do this by entering your postcode on Three’s online coverage map.

Check Three Coverage ( →

If you’re travelling abroad, it’s also possible to use the AI Cube in other countries through the Go Roam offer.

For more information about the coverage on different mobile networks, please see our in-depth guide to mobile network coverage in the UK.

More Information

For more information about the AI Cube and Three’s mobile broadband service, please see Three’s official website.

Your Comments 27 so far

We'd love to hear your thoughts and any questions you may have. So far, we've received 27 comments from readers. You can add your own comment here.

    • Hi Arthur,
      Thanks for your comment. Yes, you can use the AI Cube’s wi-fi connection to watch internet TV on your other devices (e.g. on your laptop, tablet, smart TV, etc). You obviously won’t be able to watch it on the device itself as it doesn’t have a screen.
      Hope this helps,

    • Hi Matt,
      Thanks for your comment. The AI Cube is designed to connect to Three’s 4G network and produces a Wi-Fi signal for your other devices to connect to. It can therefore replace your current home wi-fi network, so you can cancel whatever home broadband provider you’re using at the moment.
      I believe (though I’m not 100% sure) that it is possible to connect the AI Cube to your existing home wi-fi network and to use it purely as an Alexa smart speaker solution. However, to be totally honest, you’d be much better off choosing something like the Amazon Echo. It’s far cheaper than an AI Cube as you won’t need to pay for the 4G home broadband feature.
      Hope this helps,

    • Hi Joe,
      Sadly, that was a time-limited offer that Three ran for a couple of days in April. The price has since gone back up to £25/month.

Load more comments (21)

Leave a Reply

Your e-mail address will never be published. By default, I'll use it to send you an update when there are replies to your comment. However, if you don't want to receive this, you can disable it using the dropdown menu below: