iD Mobile 5G Coverage

Last updated 2nd September, 2025

You can get 5G on iD Mobile in parts of over 656 UK towns and cities and for over 62% of the UK population outdoors at the time of writing. The company uses Three’s infrastructure, so it has 5G coverage in all the same places.

iD Mobile rolled out its 5G network in late April 2021. That’s a while after some other MVNOs (mobile virtual network operators), but it was the first MVNO to offer 5G on Three’s network – though it’s now been joined by Smarty and Superdrug Mobile.

Below you’ll find full details of iD Mobile’s 5G coverage, as well as how it compares to the rest of the UK’s 5G networks.

iD Mobile 5G Summary

This page will give you an indication of iD Mobile’s coverage across the UK, but for a clear picture of its 5G coverage near you, just enter your postcode in the coverage checker at the top of this page.

That will then show you iD Mobile’s 5G, 4G, and voice coverage in the area, along with a comparison to the UK’s other networks.

We use real-time data from both the UK’s networks and independent sources, so the coverage you see is as up to date and accurate as possible.

How does iD Mobile'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.

iD Mobile has the same number of locations as Three below:

• O2 has launched 5G in 97 of the 120 locations below. 
• Three has launched 5G in 111 of the 120 locations below. 
• EE has launched 5G in 117 of the 120 locations below. 
• Vodafone has launched 5G in 96 of the 120 locations below. 

That said, those numbers just reflect the locations a network claims to have some 5G coverage in – so there won’t always be much coverage.

Further complicating matters, indoor and outdoor 5G coverage will often differ, so it’s always worth using our coverage checker or a network’s official coverage checker to make sure 5G is available exactly where you need it. That said, you can expect 5G coverage to rapidly improve.

Latest locations to get iD Mobile 5G

The latest places to get 5G on iD Mobile (via Three) include: Cleveland, Lancaster, and Sunderland.

iD Mobile coverage checker

As well as our own coverage checker above, iD Mobile has an official coverage checker, and this will show an overview of 5G coverage both indoors and outdoors in any given area, so you can get a clearer picture of what it’s like. You can also use this to check 4G coverage.

Check iD Mobile 5G coverage

4G coverage

In places where there’s no 5G, you’ll be using 4G, and iD Mobile has no shortage of coverage for those things, due to its partnership with Three.

As you can see in the chart below, it has roughly 99.8% UK population coverage with 4G, which is largely in line with rival networks.

5G roaming abroad

iD Mobile offers 5G roaming, meaning you can roam in many places at 5G speeds. You can free roam across most of Europe (at 5G speeds where available), and 5G speeds are also available in some countries outside Europe (though roaming in these places costs extra).

5G network speeds

We don’t have data on iD Mobile’s 5G speeds, but we have plenty on Three’s, which is likely to be similar since they share infrastructure and spectrum.

Three then has an average 5G download speed of 208.9Mbps according to September 2024 data from Opensignal.

In RootMetrics data covering the first half of 2025, Three was found to have a median 5G download speed of 217.3Mbps, and a 95th percentile speed (meaning close to the maximum recorded by the network) of 916.8Mbps. That’s among the highest speeds we’ve seen for any network. Its 5th percentile speed (in other words close to the lowest you’re likely to encounter on Three) was found to be 11.0Mbps.

On the whole, these are all very impressive speeds, and 5G speeds could significantly increase over time, as the networks acquire and leverage more spectrum (more on which further down).

In any case, even now 5G vastly outpaces 4G, which on Three averaged speeds of 22.2Mbps according to Opensignal data from October 2020 (which we’re using because newer reports don’t include 4G speeds).

Latency

Latency – measured in milliseconds (ms) - is the amount of time it takes a mobile network to respond to a request, before the data even starts moving on your phone.

That means a high latency can make data speeds feel lower than they are. As with speeds, we don’t have any latency data for iD Mobile, but Three’s median 5G latency could be 31ms according to 2023 Speedtest data.

Three though (and therefore likely iD Mobile) could sometimes be a lot better than that, as according to RootMetrics its 5G latency in central London was recorded at just 17ms, while all other tested networks had a higher latency.

And as with speeds, latency on 5G is likely to improve as the UK’s networks to – one day it might get as low as 1ms.

iD Mobile’s 5G frequency allocation

iD Mobile uses Three’s 5G spectrum, which means it should have access to all the frequencies shown in the chart above. As you can see, most of its 5G spectrum is high frequency, covering 3.4GHz and above.

That’s no accident, because higher frequency spectrum is typically a better fit for speedy connectivity and large numbers of devices – two things that are key to 5G.

On the other hand, lower frequency spectrum is typically longer range and better at passing through walls, so a healthy holding of both types of spectrum is preferable – and iD Mobile through Three has that.

Those advantages of low frequency spectrum are also why Three/iD Mobile might use 700MHz spectrum (acquired at a 5G spectrum auction) for 5G – though being low frequency it’s not typically considered 5G spectrum.

As for how much 5G spectrum Three/iD Mobile has, it has 140MHz in total, or 160MHz if you include its 700MHz spectrum. That’s more than any other major network – EE has 80MHz (or 120MHz including the 700MHz spectrum), O2 has 100MHz (or 120MHz with the 700MHz added), and Vodafone has 70MHz (it doesn’t have any 700MHz spectrum).

Note however that spectrum holdings could increase in future, with spectrum in the 26GHz and 8GHz bands among others identified as potential auction candidates.

Plus, Three has merged with Vodafone, and it’s likely the two networks will start fully sharing their spectrum sooner or later.