BT 5G coverage and roll-out

Last updated 12th July, 2023

BT 5G is available in all the same places as EE 5G, which means parts of over 1,000 UK towns and cities at the time of writing. That’s up from the 71 locations that BT Mobile originally launched 5G in on October 11th, 2019.

However, it’s worth noting that some of these locations won’t initially have comprehensive 5G coverage. Rather, 5G will be found primarily in places with a high population density. 

Below you’ll find a full guide to BT’s 5G network, including the key places where 5G is available, and how its coverage compares to other UK networks. Note however that BT Mobile no longer sells its own plans – instead it offers EE’s plans now, so the below information will only be relevant to existing BT Mobile customers.

BT 5G Summary

How does BT's 5G coverage compare to others?

We keep track of which networks offer 5G coverage across 120 major UK towns and cities, so you can see at a glance how they compare in key locations.

BT has the same number of 5G locations as EE below:

• O2 has launched 5G in 88 of the 120 locations below. 
• Three has launched 5G in 108 of the 120 locations below. 
• EE has launched 5G in 111 of the 120 locations below. 
• Vodafone has launched 5G in 82 of the 120 locations below. 

The chart below shows the full list of 120 major locations and which networks have coverage in each. Note however that a tick against a place just means a network has some coverage there, not that it’s comprehensive – in many cases it will be patchy, and it will often be stronger outdoors than inside. So it’s always worth taking a look at a network’s official coverage checker before opting for a 5G plan.

Latest locations to get BT 5G

The most recent places that BT (through EE) has brought 5G to (as of July 2023) include Darlington, Dorchester, Dumfries and Galloway, and Galashiels.

BT coverage checker

BT Mobile has an online coverage checker where you can enter your postcode to view coverage in your area. You can view 5G, 4G, 3G and even 2G coverage.

You should definitely check the 5G coverage in your area before buying a 5G phone or plan, as it won’t initially be available everywhere, even within the cities that have partial coverage.

CHECK BT COVERAGE

4G coverage

If you’re not in a 5G coverage area then you can still use your phone even on a 5G plan, you’ll simply access 4G or 3G, just like you would have been doing for years before 5G arrived.

You can see an overview of BT’s 4G coverage and that of other networks below.

5G roaming abroad

At the time of writing, it’s only a few networks that let you roam abroad using 5G (and only in select locations), and on BT you’re limited to 4G or slower. We’ll update this if/when that changes. For 4G and 3G roaming you can use your allowances in 47 destinations (mostly in Europe) without paying extra.

5G network speeds

We don’t have much data on BT’s 5G speeds, but we do have quite a bit on EE’s, and they’re likely to be similar since they use the same infrastructure and spectrum.

On that front, you can see the highlights in the chart above. Those include an average 5G download speed of 122.3Mbps according to Opensignal data from April 2023.

Similarly, data collected by RootMetrics in the second half of 2022 points to a median 5G download speed of 141.6Mbps. The same report puts EE’s 95th percentile 5G download speed (which should be close to the maximum) at 380Mbps, and its 5th percentile (which should be close to the minimum) at 20.1Mbps.

Going by Point Topic data from September 2020 we get largely similar results too, as this found that EE had an average 5G download speed of 149.9Mbps, and a median 5G download speed of 130Mbps, but its maximum 5G download speed was much higher at 753Mbps.

Meanwhile, Ookla data from the first half of 2021 recorded EE’s median 5G download speed as 151Mbps, which is slightly higher than the results above, while a RootMetrics report from the second half of 2021 included a highest median 5G download speed of 187.8Mbps for EE in tested cities, which is even higher.

BT for its part has said to expect speeds that on average are around 150Mbps faster than 4G, with peak speeds of potentially 1Gbps.

• Useful read: How fast is 5G?

Latency

We don’t know how low BT’s 5G latency is yet, but in theory latency on 5G can be as little as around 1 millisecond (ms).

That’s a big improvement on the 30-50ms typically seen on 4G, and could be hugely beneficial, as latency is how long a network takes to even respond to a request – so a high latency can hold things up even with superfast data.

EE for its part has said to expect an almost “instant connection” – though we wouldn’t expect anything as low as 1ms just yet.

Indeed, according to 2021 data from Ookla, EE’s median 5G latency is 29ms.

There’s also a late 2020 RootMetrics report which showed EE’s latency in central London as being 45ms – as with the speed data, BT’s results might be similar.

BT’s 5G frequency allocation

Mobile signals travel on various different frequencies, with the ones above being used by BT (and EE).

For 5G it currently uses the 3.4GHz and 3.6GHz frequencies, the latter of which it acquired spectrum from at the second 5G spectrum auction. Those are high frequencies, which is beneficial because high frequencies tend to be available in greater capacities, allowing for more simultaneous connections and potentially more reliability and high speeds, even when a lot of users are using a lot of data.

The lower frequency bands which BT uses for 3G and 4G meanwhile can travel further and are better able to pass through obstacles, so they have their own advantages.

BT also has access to some 700MHz spectrum, which has been identified as a good candidate either for 4G or for boosting the range and penetration of 5G signals. EE has now confirmed that this will be used for 5G, so it will presumably be used for 5G by BT too.

BT through EE has access to 40MHz of 3.4GHz spectrum and 40MHz of 3.6GHz spectrum at the time of writing, so 80MHz of 5G spectrum in total. That’s the same total amount as O2, but marginally less than Vodafone (which has 90MHz).

It’s also far less than Three – which has 140MHz in total. that these figures don’t include the aforementioned 700MHz spectrum, as while some networks will use this for 5G, it’s not typically considered 5G spectrum. If you do factor that in though, then BT/EE has 120MHz, O2 has 100MHz, Three has 160MHz, and Vodafone still has 90MHz. That said, there may yet be additional spectrum auctions, so networks may be able to acquire more in future.