BT Full Fibre 100 Broadband Review 2025
BT Full Fibre 100 sits comfortably between the lower-tier Fibre 1 and 2 plans and the flagship Full Fibre 900, offering above-average speeds, improved performance, and a more reliable broadband experience, thanks to its fibre-to-the-premises (FTTP) network.
Delivering average speeds of 150 Mbps down and 30 Mbps up, BT Full Fibre 100 is a solid mid-range broadband choice for households that need consistent speeds for streaming, gaming, and working from home.
Latest Offers: Free setup. £50 Reward Card. Ends 27th March
BT Full Fibre 100 currently reaches around 50% of UK households—a decent level of coverage. However, it’s not the most competitively priced option for this speed tier. In this in-depth review, we explore its speed, reliability, and assess whether it offers good value for money.
Table of Contents
Features
Speed Overview and Latency
BT Full Fibre 100 offers download speeds of 150 Mbps, clearly ahead of hybrid fibre plans (FTTC) that usually hover between 36 and 67 Mbps. It also provides 30 Mbps upload speeds, a considerable upgrade from Fibre 1 or Fibre 2, where uploads often fall between 9 and 18 Mbps. Its fibre-to-the-premises (FTTP) network ensures steady performance, even during peak usage.
| Average Download | 150 Mbps |
|---|---|
| Average Upload | 30 Mbps |
| Latency | 7–8 ms |
BT Full Fibre also offers low latency, typically around 7–8ms, which is great for gamers and remote workers. By eliminating copper cabling between the cabinet and your home, Full 100 keeps ping times impressively low, ensuring smooth gameplay and lag-free video calls.
Reliability and Consistent Speeds
Full-fibre broadband ensures more stable connectivity and consistent speeds, especially during peak usage periods.
The fibre-only FTTP setup removes common issues associated with copper lines, including signal interference and speed degradation over distance. Although occasional technical faults may still arise, they’re typically less frequent than with part-fibre broadband.
Pricing and Promotional Offers
BT Full Fibre 100 prices depend on when and where you sign up. Promotional deals can bring the price down to £29.99 per month, while the standard cost is usually around £34.99.
However, BT customers should be aware of annual price increases. Every year on 31 March, broadband prices rise by approximately £3 per month, and BT TV customers see a further £2/month increase. These adjustments are applied automatically, even within the minimum contract period.
BT Full Fibre 100 vs competitors’ pricing
| Provider | Download / Upload Speeds | Approx. Monthly Cost |
|---|---|---|
| BT Full Fibre 100 | 150 Mbps / 30 Mbps | £29.99 – £34.99 |
| Sky Ultrafast Full Fibre | 145 Mbps / 29 Mbps Up | £29.00 |
| Virgin Media M125 | 132 Mbps / 20 Mbps | Often cheaper than BT |
| Plusnet Full Fibre 145 | 145 Mbps / 20 Mbps | £25.99 |
When comparing BT Full Fibre 100 with similar plans, you’ll find that Sky’s Ultrafast Full Fibre typically delivers around 145 Mbps download and 29 Mbps upload, at a monthly cost of about £29. Virgin Media’s M125 reaches roughly 132 Mbps and often comes at a lower price point. Meanwhile, Plusnet—owned by BT—sometimes sells Full Fibre 145 for £25.99, which can be £9 cheaper in certain deals. Despite these options, BT justifies its higher cost through UK-based support, brand reputation, and reliable network performance.
Who Should Consider These Speeds?
Offering 150 Mbps download, Full Fibre 100 is ideal for households with multiple devices running simultaneously—whether you’re streaming HD or 4K content, gaming online, downloading large files, or making video calls. The 30 Mbps upload speed is also great for sending large files to the cloud and conducting high-res video conferences.
This mid-tier service is perfect for people who need more than the 30–70 Mbps range but aren’t quite ready to pay for ultra-fast 500 Mbps or 900 Mbps options. For many, it offers an ideal balance of speed, reliability, and affordability.
Installation and Setup
When you order a BT Full Fibre package, you can schedule an engineer appointment online or by phone. Available slots vary by location, so booking early is a good idea if you have preferred dates. Before the engineer arrives, BT will send a Smart Hub 2 router (or a newer equivalent). Make sure it’s on hand for installation; if you miss the initial delivery, pick it up from the designated location to avoid delays. If you already own a Smart Hub 2, expect a smaller package with an Ethernet cable and a leaflet—hand these over to the engineer if needed.
On installation day, an Openreach engineer will call before arrival. They first switch off your old service at the street cabinet or exchange and connect your new full-fibre line. Because it’s a fibre-to-the-premises network, there’s no reliance on copper wiring. The engineer will discuss the best spot to place your Smart Hub 2 for optimal WiFi coverage, potentially redoing or removing old extension wiring if needed. A key piece of hardware they’ll install is the Optical Network Terminal (ONT), which attaches to your wall and hooks up to the router, converting fibre signals into a usable internet connection.
Once everything is in place, the engineer tests the new service’s speed and ensures your devices connect properly. If you run into any issues after they leave, BT’s support team is available to assist or arrange a follow-up visit.
Stay Fast Guarantee
BT’s Stay Fast Guarantee ensures that your connection doesn’t fall below a certain minimum download speed. For Full Fibre 100, this threshold is 100 Mbps. If your service consistently underperforms, BT will attempt fixes—remotely or via an engineer—and give you the option to leave penalty-free plus claim £20 if the issue remains unresolved after 60 days.
External factors like home wiring or local network congestion can still impact speeds, but full-fibre setups reduce such bottlenecks by avoiding copper wiring. Note that the Stay Fast Guarantee focuses on download speed rather than upload, though Full Fibre 100’s 30 Mbps upload rate generally holds steady in everyday use.
Value for Money
Comparative Pricing
Whether BT Full Fibre 100 is worth it depends on its monthly cost, customer service, included perks, and the competition in your area. Over 24 months, deals can dip to £29.99, but you might pay £34.99 or more after the promo, plus an annual £3 increase.
Sky and Virgin Media often provide similar or slightly slower speeds at a lower price. Meanwhile, Plusnet—owned by BT—occasionally offers speeds around 145 Mbps for £25.99, saving £9–£10 a month over two years. However, it doesn’t bundle all the extras or TV options BT might include.
Cost vs Speed
A 150 Mbps plan priced near £29.99 a month is relatively competitive across the UK, especially since older FTTC plans at 67 Mbps can sometimes cost only a bit less. Doubling or tripling your speed may justify a slight increase in monthly expenditure, particularly if your household regularly pushes its current connection to the limit.
If, on the other hand, your usage is limited to lighter demands—moderate streaming, web browsing, and rare video chats—you might find better value either in alternative BT packages or from other providers.
For many people, a stable 50–70 Mbps connection still meets their needs, particularly if there are no simultaneous HD or 4K streams going on. In that scenario, the advantages of Full Fibre 100 might not outweigh its extra cost.
Special Offers
BT often offers promotional packages for its Full Fibre service, which might include a £50 reward card, waived installation fees, discounted BT TV plans, or up to a year’s worth of free game streaming.
Customer Service and Reliability
BT offers customer service using call centres in the UK and Ireland, which often leads to stronger satisfaction ratings. The provider’s FTTP network delivers steady speeds, and engineer visits can be arranged quickly when needed. For those wanting reliable connections and efficient help, paying a bit more may be worthwhile.
Balancing Price and Speed
Whether BT Full Fibre 100 is right for you depends on how many people use it and what they do online. If you stream 4K content, enjoy graphics-heavy gaming, or work from home with video calls, jumping from 60–70 Mbps to 150 Mbps can be a big improvement.
Lighter users might not see as much benefit. Overall, Full Fibre 100 comfortably supports multiple devices and busy streaming. The question of cost comes down to comparing alternatives in your area—especially if another provider offers a similar FTTP package at a lower price.
BT Smart Hub 2 Router
All BT broadband customers, including those on Full Fibre 100, now get the Smart Hub 2 as standard. Here’s a look at its features:
- WiFi 5 (802.11ac): Newer routers come with WiFi 6, but the Smart Hub 2 still uses WiFi 5. This is fine for most setups, though advanced users with WiFi 6 devices might feel limited.
- Four Gigabit Ethernet Ports: Ideal for directly connecting consoles, TVs, or PCs and achieving near-maximum speeds.
- DECT Functionality: Handy for integrating cordless landline phones if you add a home phone service.
- Complete WiFi Compatible: Pair the hub with WiFi discs for broader coverage through BT’s Complete WiFi system.
While it lacks WiFi 6, the hardware typically supports Full Fibre 100 speeds without issues. If you need cutting-edge WiFi 6 performance, you can install a separate router behind the Smart Hub 2—just be aware of the extra configuration steps.
Complete WiFi
Complete WiFi is an optional add-on designed to push wireless coverage into every nook of your home. BT will supply up to three WiFi “discs”, which link wirelessly to your Smart Hub 2 and function like mesh extenders.
Priced at £10 per month, it comes with a guarantee of strong WiFi everywhere—or BT will provide extra discs, and if that still doesn’t fix coverage issues, you can claim up to £100. One caveat: you’re locked into a 24-month commitment and can’t cancel early if it doesn’t meet your expectations. Some customers receive Complete WiFi as part of BT Halo, included in a higher-end package.
Hybrid Connect
BT’s Hybrid Connect is a premium feature that switches your home broadband to an EE mobile network if your fibre line experiences an outage. The small backup router integrates seamlessly with the Smart Hub 2, costing roughly £7.55 per month, though premium BT Halo subscriptions might include it. However, it could be more than you need if you’re comfortable relying on your phone’s hotspot during brief outages.
BT Halo
BT’s Halo add-ons, including Halo 3 and 3+, combines services such as Complete WiFi, Hybrid Connect backup, and Home Tech Experts for in-person support. You can also get doubled data for EE mobile. While these bundles sound convenient, they can be pricey, and some users save money by choosing standalone services instead of a Halo package.
BT Home Phone and TV
BT now offers broadband without a fixed phone line by default. You can take on a phone line for £5 monthly, plus unlimited calls if needed. BT TV includes NOW TV memberships for its core content (Sports, Entertainment, etc.). Keep an eye on the overall cost, as bolting these to Full Fibre 100 can add up quickly.
Is BT Full Fibre 100 any good?
Pros and Cons
Pros
- Fast, Reliable Speeds: Consistent 150 Mbps down and 30 Mbps up outperform many part-fibre plans.
- Stay Fast Guarantee: BT guarantees a minimum 100 Mbps and offers £100 compensation if BT can’t fix it.
- Low Latency: A direct fibre connection offers 7–8 ms, ideal for gaming, video calls, and real-time applications.
- Reliability & UK-Based Support: BT operates call centres in the UK and Ireland, generally resulting in fewer customer service issues than some rivals.
- Extras: Options like Complete WiFi and Hybrid Connect deliver extended coverage and mobile backup.
Cons
- Comparatively Pricier: Compared to some providers (e.g., Plusnet or Virgin), BT Full Fibre 100 may cost more.
- Annual Price Increase: Every March, your monthly fee will go up by £3, no matter where you are in your 24-month term.
- Limited Availability: Full Fibre 100 is only available to about 50% of UK homes right now.
- No WiFi 6 on Smart Hub 2: Smart Hub 2 lacks WiFi 6 support.
- Add-On Costs: Features like Complete WiFi and Hybrid Connect can increase monthly bills significantly.
Conclusion
If you’re looking for a reliable mid-range fibre deal, BT Full Fibre 100’s 150 Mbps download speed might hit the mark. It’s enough for streaming 4K shows, intense gaming sessions, and work-from-home video calls. BT also offers a Stay Fast Guarantee (minimum 100 Mbps) and UK based customer service, giving peace of mind to those who need hassle free broadband.
On the downside, pricing may be higher than similar plans from Virgin, Sky, or Plusnet.
BT full fibre broadband is not a cheap option compared to most UK providers including Virgin Media. In particular, Full Fibre 100 is more expensive than Virgin Media M125 fibre broadband or Sky Full Fibre.
Other HTTP providers like Vodafone, Hyperoptic and Community Fibre are offering not only the cheapest deals for this speed also offer symmetrical full fibre with the same upload speed as download speed.
What is Full Fibre Broadband?
Technically, full fibre broadband reaches homes via FTTP (fibre to the premises) networks. This advanced technology uses fibre optic cable as the entire connection between the exchange and the user’s premise, this is why it’s called full fibre or fibre to the premises broadband. Conversely, FTTC (fibre to the cabinet) is slowly becoming outdated technology that uses fibre only to the street cabinet, each user is then connected to it using copper.
Since fibre cable is more effective at transmitting data at a faster rate, full fibre connection is preferred over FTTC broadband as it is more reliable and more than 10 times faster than FTTC broadband.
Full fibre broadband also offers incredibly faster upload speeds and lag-free internet. It can connect up to 50-100 users simultaneously and provides consistent data transmission to all connected devices. Due to these advantages, full fibre is often considered the first choice for UHD streaming and online gaming.
Additionally, many UK providers are upgrading to FTTP broadband for the reasons mentioned above, which has resulted in increased nationwide availability in recent years.
Overview of BT Full Fibre broadband
BT also offers two other full fibre options which come with similar features, the only difference being speed. You can choose the best plan based on speed and the number of devices you use at the same time.
Overall, a comparison of these packages looks like this:
Full Fibre 300
- Average download speed: 300Mbps
- Average upload speed: 49Mbps
- Minimum guaranteed speed: 150Mbps
- Router: Smart Hub 2
Full Fibre 500
- Average download speed: 500Mbps
- Average upload speed: 73Mbps
- Minimum guaranteed speed: 250Mbps
- Router: Smart Hub 2
Full Fibre 900
- Average download speed: 900Mbps
- Average upload speed: 110Mbps
- Minimum guaranteed speed: 700Mbps
- Router: Smart Hub 2
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