BT Full Fibre 900 Broadband Review

BT Full Fibre 900 pros and cons

Pros

• BT’s fastest home broadband plan offers average 900Mbps download and 110Mbps upload speeds.
• The download speed is 80% faster than Full Fibre 500, reducing waiting times for frequent game installations and large file transfers.
• Several people can stream, download, game and join video calls simultaneously without exhausting the available bandwidth.
• The 110Mbps upload speed is the fastest included with BT’s standard home broadband plans.
• The 700Mbps Stay Fast Guarantee gives customers a much higher guaranteed speed to the hub than BT’s slower Full Fibre plans.
• Smart Hub 3 has Wi-Fi 6, a 2.5Gbps WAN connection and four Gigabit Ethernet ports.

Cons

• Full Fibre 500 costs less and offers enough bandwidth for most households.
• Ordinary browsing, video calls, streaming and online gaming will not become significantly better simply by moving from 500Mbps to 900Mbps.
• The 110Mbps upload speed is considerably lower than the download speed and slower than symmetrical gigabit services.
• A single phone, laptop or television will often receive less than 900Mbps over Wi-Fi.
• Smart Hub 3 lacks Wi-Fi 7 and does not have a 2.5Gbps LAN port for computers or network storage.
• Most offers come with a 24-month contract and scheduled annual price increases, making the complete contract cost important.

Households suited to BT Full Fibre 900

Full Fibre 900 is best for homes that transfer large amounts of data and often have several bandwidth-intensive activities taking place together. The main benefit is additional capacity during busy periods rather than faster browsing or lower gaming latency.

The plan is particularly suitable for:

• larger households with five or more regular internet users;
• gamers who frequently download 50GB to 150GB titles and updates;
• photographers and video editors transferring large project files;
• homes running several 4K streams, video calls and downloads simultaneously;
• customers who want the fastest BT plan and accept its slower upload compared with symmetrical providers.

A household that streams television, browses, plays online games and works from home will rarely need 900Mbps. BT Full Fibre 300 is sufficient for many families, while BT Full Fibre 500 gives heavier users substantial capacity at a lower cost than Full Fibre 900.

Eligible low-income households should compare BT Home Essentials. The available speeds are lower, but the social tariff can reduce essential broadband costs considerably.

BT Full Fibre 900 options

Full Fibre 900 can be ordered as broadband only or combined with optional home phone and television services. None of these additions increases the 900Mbps broadband speed.

Broadband only

The broadband-only package includes unlimited data and a BT hub without a working home phone service. It is the most direct option for customers interested in near-gigabit broadband rather than a combined communications package.

Digital Voice

Digital Voice adds internet-based home calls. It uses the same hub and broadband connection, but standard telephone use consumes only a small amount of the available bandwidth.

The service stops if the ONT or hub loses power. Customers using telecare, healthcare or alarm equipment should check compatibility and available backup arrangements before switching.

EE TV

Full Fibre 900 can be combined with an EE TV package, including entertainment, film and sport options. Our BT broadband and TV packages guide compares the available content and set-top boxes.

EE TV does not require a 900Mbps connection. Even several 4K streams use only part of this plan’s capacity. Choose Full Fibre 900 with television only when the household also needs the faster broadband for downloads, cloud transfers or extensive simultaneous use.

Smart Hub 3 performance on Full Fibre 900

New Full Fibre 900 orders include Smart Hub 3. Existing customers changing plan can retain compatible equipment, so check the order summary for the router supplied with the order.

Smart Hub 3 uses dual-band Wi-Fi 6 with 3×3 2.4GHz and 4×4 5GHz radios. It also has four 1Gbps LAN ports and a 2.5Gbps WAN port for the connection to the Openreach ONT.

The distinction between these ports matters on Full Fibre 900. The 2.5Gbps WAN port receives the broadband connection, but each wired device connects through a 1Gbps LAN port. Ethernet overheads usually limit the usable result from a Gigabit port to less than its 1,000Mbps link speed. A result in the 900Mbps range can therefore indicate that the plan is performing correctly.

Wi-Fi 6 can deliver several hundred megabits to a suitable device and can approach the package speed under excellent conditions. Performance falls with distance, walls, interference and older device hardware. Many phones, televisions and laptops cannot receive 900Mbps over Wi-Fi even when the broadband connection is operating normally.

For the most accurate Full Fibre 900 test:

• connect a modern computer to the hub using Cat 5e or Cat 6 Ethernet;
• confirm that the computer has a Gigabit Ethernet connection;
• pause large transfers and streaming on other devices;
• disconnect any VPN that limits speed;
• test against a server capable of delivering near-gigabit bandwidth.

Smart Hub 3 is capable of using this plan’s speed, but EE offers newer Wi-Fi 7 equipment with its current 900Mbps package. Customers wanting multi-gigabit LAN, advanced network controls or faster wireless technology will need to compare other routers or providers.

Complete Wi-Fi, Hybrid Connect and Halo with Full Fibre 900

Full Fibre 900 can deliver near-gigabit speed to Smart Hub 3, but Wi-Fi coverage and backup broadband have separate limitations. Complete Wi-Fi extends the wireless signal, while Hybrid Connect keeps essential devices online when the fixed connection fails.

Complete Wi-Fi

Complete Wi-Fi extends the hub’s signal into poorly connected rooms. BT supplies one Wi-Fi unit initially and can send up to two more after checking the home network. Customers can receive a one-off £100 bill credit if BT cannot deliver a reliable connection in every room of the main home.

The guarantee does not promise 900Mbps in every room. Wireless speeds decrease with distance, walls, interference and the connection between each Wi-Fi unit and the hub.

Customers wanting near-gigabit performance in several rooms should consider:

• Ethernet connections for computers, consoles and network storage;
• wired wireless access points for other floors;
• a more advanced mesh system with wired connections between units.

Hybrid Connect

Hybrid Connect automatically transfers the home network to EE 4G when the fixed broadband connection fails. The mobile connection offers speeds of up to 30Mbps for downloads and 5Mbps for uploads, compared with Full Fibre 900’s average 900Mbps download and 110Mbps upload speeds.

Browsing, messaging and individual video calls can continue, but large downloads, cloud backups and several high-resolution streams will become restricted. Digital Voice will not operate over the backup connection. Some EE TV subscription channels also require the app until the fixed service returns.

Hybrid Connect requires suitable EE 4G coverage and electricity for the hub and backup equipment.

Halo options

Halo 3+ combines Complete Wi-Fi with automatic Hybrid Connect. It also includes access to Home Tech Experts and BT’s renewal price promise.

Halo 3 uses the Keep Connected Promise instead. BT sends a 4G Mini Hub after a reported broadband fault or for an eligible home move, rather than automatically transferring the existing home network to 4G.

Compare the additional contract cost before choosing Halo solely for one feature. Ethernet or a separate mesh system can be more suitable when the main requirement is receiving faster Full Fibre 900 speeds throughout a larger home.

How fast is BT Full Fibre 900?

BT Full Fibre 900 offers an average 900Mbps download speed and 110Mbps upload speed. It can download data more than eight times faster than it can upload it.

Download speed

A 900Mbps connection has a theoretical transfer speed of 112.5 megabytes per second. Network overheads, the download server, storage speed and home equipment prevent most transfers from remaining at that maximum from beginning to end.

This speed is most valuable for large games, operating-system downloads and high-resolution media files. Small websites and standard apps will not feel nine times faster than on a 100Mbps connection because server response, latency and device processing also affect loading time.

Large-file download times

Ideal download times at 900Mbps are:

File size	Minimum download time
1GB	9 seconds
10GB	1 minute 29 seconds
50GB	7 minutes 24 seconds
100GB	14 minutes 49 seconds

These calculations assume that the source, home network and receiving device can maintain 900Mbps. A game platform can impose its own limit, while installing or decompressing a download can extend the total waiting time.

Simultaneous use and gaming

A 4K stream commonly uses 15–25Mbps. Ten such streams would consume 150–250Mbps, leaving most of the connection available for other devices. Full Fibre 900 therefore benefits homes where several high-bandwidth activities overlap.

Online gaming needs little bandwidth after a title has loaded. Moving from Full Fibre 500 to 900 will shorten game downloads but will not automatically reduce ping. Server location, network routing, congestion and the connection between the console and hub have a greater influence on latency. Connect the console or gaming computer by Ethernet for more consistent performance.

Upload speed

The average 110Mbps upload speed is suitable for several video calls, cloud backups, sending large work files and live streaming. Its theoretical transfer speed is 13.75 megabytes per second.

At 110Mbps, a 10GB upload has an ideal minimum time of 12 minutes 7 seconds. A 100GB upload takes 2 hours 1 minute 13 seconds. Full Fibre 500 needs more than three hours for the same 100GB transfer at its average 73Mbps upload speed.

The 110Mbps upload remains far behind a symmetrical 900Mbps or 1Gbps service. Video professionals and customers moving hundreds of gigabytes to cloud storage will save much more time with upload speed equal to the download speed.

Wired and Wi-Fi results

A wired speed test can still show less than 900Mbps because the test server, computer, security software or Ethernet adapter may be the restriction. Repeat the test with more than one suitable server before reporting a fault.

Wireless results vary more widely. A modern Wi-Fi 6 device close to Smart Hub 3 can receive a large proportion of the connection, while an older phone on 2.4GHz can be many times slower. One low wireless result does not show that the Full Fibre line is faulty.

BT’s Stay Fast Guarantee measures the broadband speed reaching the hub. It does not promise 900Mbps to an individual device.

BT Full Fibre 500 or 900?

Full Fibre 900 offers 80% more download speed and 51% more upload speed than Full Fibre 500. The benefit becomes significant when the household transfers large files frequently.

Comparison	Full Fibre 500 and 900
Average speeds	500: 500Mbps download, 73Mbps upload 900: 900Mbps download, 110Mbps upload
50GB download	500: 13 minutes 20 seconds 900: 7 minutes 24 seconds (Time saved: 5 minutes 56 seconds)
100GB download	500: 26 minutes 40 seconds 900: 14 minutes 49 seconds (Time saved: 11 minutes 51 seconds)
100GB upload	500: 3 hours 2 minutes 39 seconds 900: 2 hours 1 minute 13 seconds (Time saved: 1 hour 1 minute 26 seconds)

These are ideal transfer times. The file server, computer, storage drive, home network and other internet use can increase them.

Full Fibre 500 is sufficient for most busy households using several 4K streams, video calls, gaming sessions and ordinary downloads simultaneously. See our BT Full Fibre 500 review for a detailed assessment.

Choose Full Fibre 900 when 50GB to 100GB downloads occur frequently, several large transfers take place together or the additional upload capacity reduces working time. A suitable wired connection or capable Wi-Fi 6 device is needed to receive most of the available speed.

Moving from 500Mbps to 900Mbps will not improve streaming quality after the service has enough bandwidth, and it will not automatically reduce gaming latency. If the complete contract cost is considerably higher, Full Fibre 500 offers better value for most households. 500 is usually better value when the household mainly streams, works from home and plays games online without frequent large downloads.

Installation and availability

Openreach Full Fibre reached more than 23 million UK homes and businesses by May 2026, covering more than two-thirds of premises. Full Fibre 900 availability still depends on the exact property, so complete BT’s postcode and premises check before ordering.

A first Full Fibre installation normally requires an engineer to bring fibre into the property and install an Optical Network Terminal. The ONT connects to Smart Hub 3 by Ethernet, and both devices require a nearby power socket.

Customers with an active, compatible Openreach ONT can normally upgrade from Full Fibre 300 or 500 to 900 remotely. Testing the faster service requires a computer with Gigabit Ethernet and a Cat 5e or Cat 6 cable. An engineer is needed only when the fibre line, ONT or internal cabling requires installation or repair.

Most residential provider changes use One Touch Switch, allowing BT to arrange the transfer from the existing provider. If Full Fibre is unavailable, our BT Fibre 1 and Fibre 2 review explains BT’s part-fibre alternatives.

Is BT Full Fibre 900 any good?

Yes, but it is most suitable for homes that frequently transfer very large files or have several heavy users online simultaneously. Its 700Mbps Stay Fast Guarantee also gives customers a high minimum download speed to the BT Hub.

Full Fibre 500 is sufficient for most streaming, gaming, home working and video calls. At ideal speeds, Full Fibre 900 saves 11 minutes 51 seconds on each 100GB download. Four such downloads in four weeks save 47 minutes 24 seconds, while ordinary browsing and streaming will show little improvement.

Assess its value using the complete minimum-term cost. Include the setup charge, scheduled annual increases and any BT Reward Card shown in the pricing table. A Reward Card reduces the effective cost only when it is claimed and activated before the applicable deadlines.

Smart Hub 3 can deliver most of the connection speed through Gigabit Ethernet. Wi-Fi results will often be lower, and customers wanting Wi-Fi 7, multi-gigabit device ports or upload speed equal to the download speed should compare alternative providers.

In Ofcom’s latest broadband complaints data, covering January to March 2026, BT’s result was statistically comparable with the industry average. Plusnet and Sky received fewer complaints.

Choose Full Fibre 900 for frequent 50GB to 100GB downloads, extensive simultaneous use or BT’s fastest standard upload speed. Choose Full Fibre 500 when large downloads are less frequent and its complete contract cost is lower. Full Fibre 900 is fast and capable, but most households will receive better value from BT’s 500Mbps plan.

BT Full Fibre 900 compared with rival packages

BT competes with several near-gigabit plans. Router technology, upload speed, television options and complete contract cost are often more important than small differences in download speed.

• Plusnet Full Fibre 900
  Average 900Mbps download and 115Mbps upload speeds. It offers a slightly faster upload and often costs less, but its Hub Two uses Wi-Fi 5 and Plusnet does not offer a television service.
• Sky Full Fibre Gigafast
  Average 900Mbps download and 90Mbps upload speeds. BT offers the faster upload, while Sky is better suited to customers combining broadband with Sky television.
• EE Full Fibre 900
  Average 900Mbps download and 110Mbps upload speeds with a 700Mbps speed guarantee. Current qualifying orders include the Wi-Fi 7 Smart Hub 7 Plus, giving EE the router advantage.
• Virgin Media Gig1
  Average 1,130Mbps download and 104Mbps upload speeds. It downloads faster than BT, while BT offers a slightly faster upload and wider Openreach Full Fibre availability.
• CityFibre and independent gigabit providers
  Selected plans offer 900Mbps or 1Gbps download and upload speeds. They are much faster for large uploads, although coverage, routers and contract terms vary.

BT is more attractive when its current Reward Card improves the complete cost or when Complete Wi-Fi, Hybrid Connect, Digital Voice or EE TV is valuable. Plusnet is better for a lower-cost Openreach service, EE for Wi-Fi 7 and symmetrical providers for upload-intensive work.

BT Full Fibre 900 FAQs

Is BT Full Fibre 900 the same as 1Gbps broadband?

No. Full Fibre 900 offers an average 900Mbps download speed, while one gigabit equals 1,000Mbps. It is therefore a near-gigabit package rather than a complete 1Gbps service.

The personal speed estimate and minimum guarantee shown before ordering are more useful than the gigabit description when assessing the connection available at a particular property.

Does Full Fibre 900 require a 2.5Gbps Ethernet port?

No. A Gigabit Ethernet connection has a usable maximum close to 940Mbps after networking overheads, which is sufficient for Full Fibre 900’s average speed.

Smart Hub 3 uses its 2.5Gbps WAN port for the connection to the Openreach ONT. Computers, consoles and other wired devices connect through its four 1Gbps LAN ports.

Why does a wired speed test show less than 900Mbps?

The test server, Ethernet adapter, processor, storage drive, VPN, security software and other household traffic can all restrict the result.

Use a computer with Gigabit Ethernet, a Cat 5e or Cat 6 cable and more than one suitable test server. Pause other downloads and disconnect any VPN before testing.

Can Smart Hub 3 deliver 900Mbps over Wi-Fi?

A capable Wi-Fi 6 device close to Smart Hub 3 can receive a large proportion of the connection speed under excellent wireless conditions. BT does not guarantee 900Mbps to an individual wireless device.

Walls, distance, interference and the wireless hardware inside the phone or computer commonly reduce the result. Gigabit Ethernet gives the clearest indication of the broadband speed reaching the home.

Can one download use the full 900Mbps connection?

Not always. The website, game platform or cloud service sending the file can impose a lower speed. The receiving computer also needs sufficiently fast networking, processing and storage.

Full Fibre 900 remains useful when several downloads or other high-bandwidth activities occur together, even if one transfer does not use the complete connection.

Does Full Fibre 900 reduce gaming latency compared with Full Fibre 500?

Not automatically. Both packages use the same Full Fibre technology, and online gameplay requires relatively little bandwidth.

Full Fibre 900 downloads games and updates faster and leaves more bandwidth for other users. Game-server location, network routing, congestion and the connection between the gaming device and hub have a greater effect on latency.

Is Full Fibre 900 worth choosing instead of Full Fibre 500?

Full Fibre 900 offers 80% more download speed and 51% more upload speed. Choose it when large downloads occur frequently, several high-bandwidth activities overlap or the additional upload capacity saves working time.

Full Fibre 500 is sufficient for most households using several streams, video calls and gaming sessions. Compare the complete contract costs before upgrading.

Is the 110Mbps upload speed suitable for content creation?

Yes. It is sufficient for live streaming, video calls, cloud backups and regular transfers of large photographs or videos.

A 100GB upload has an ideal minimum time of 2 hours 1 minute 13 seconds. Professionals transferring files of this size daily will save considerably more time with a symmetrical gigabit service.

Can a third-party router improve Full Fibre 900 performance?

A different router cannot increase the broadband connection beyond its package speed. It can deliver faster wireless connections, wider coverage, Wi-Fi 6E or Wi-Fi 7, multi-gigabit LAN ports and more network controls.

Check Digital Voice, Complete Wi-Fi and Hybrid Connect compatibility before replacing Smart Hub 3. BT can also ask customers to reconnect its hub when diagnosing a broadband fault.

Which speed does BT guarantee with Full Fibre 900?

The Stay Fast Guarantee is 700Mbps download and 10Mbps upload to the BT Hub. It does not guarantee 900Mbps to every phone, tablet or computer over Wi-Fi.

Customers must report the problem and complete BT’s diagnostic checks. If BT cannot restore the guaranteed speed within 30 days, the customer can leave without paying an early termination charge. An eligible claim can also receive a £20 Reward Card, with up to four claims permitted in one year.