What is 5G?

21 October 2020

What is 5G? 

Contents list

  1. What is 5G?
  2. What are the benefits of 5G?
  3. Where is 5G available in the UK?
  4. How do I get 5G?
    1. What do I need?
    2. What 5G phones are there?
    3. What 5G SIM deals are there?
    4. Is 5G broadband available?
  5. How will 5G change our lives?
  6. Frequently Asked Questions

5G has begun rolling out across the UK and beyond, but we are still in the early stages of this transformative technology which will have a huge impact on our lives in the years to come.

Below we’ll explain both what 5G is and – more importantly – what it means for you now and in the future, along with answering other key questions you might have about this exciting new tech.

1. What is 5G?

5G (which stands for fifth generation) is the next step in mobile technology, following on from 4G before it and 3G before that, and like the jump from 3G to 4G, you’ll be getting far higher speeds on 5G than on any of the technologies that came before.

We’re talking both upload and download speeds, and we’ve got a whole guide to 5G speeds and what they allow you to do, but speed isn’t all 5G has going for it. 5G also offers lower latency (the time a network takes to respond to a request), promises greater capacity for users, and will enable and improve all sorts of related tech, such as the Internet of Things (IoT).

1.1 What is the difference between 4G and 5G?





Higher latency

Lower latency

Better coverage

Limited coverage

Lower frequency spectrum

Higher frequency spectrum

Lots of compatible phones

Growing list of compatible phones

Jump to full details for 5G speed, latency, coverage and phones.

We’ve touched on some of the differences between 4G and 5G above, with the most publicised one being speed. On 4G you’re looking at an average of around 20-30Mbps, while with 5G that shoots up to around 130-240Mbps currently and is set to get faster still as networks improve.

Latency meanwhile is a lot lower on 5G. This is the measure of how long a network takes to respond to a request before data even starts moving, and while it averages around 35-50ms on 4G, it’s currently around 21-26ms with 5G. As with speed, that’s expected to improve over time.

5G also uses different and typically higher frequency spectrum and new technologies, which you’ll find more details about below in our ‘how does 5G work’ section.

And with all these new technologies and improvements, whole new use cases will open up for 5G that just weren’t viable with 4G, from truly smart cities to remote working in almost every industry and beyond.

Coverage also differs on 5G of course, and that’s one of the few areas where 4G has an advantage at the time of writing, but 5G coverage is improving rapidly. You can find full details of the latest progress in our 5G coverage guides.

5G also isn’t yet supported on as many phones as 4G, but many new handsets do support it, all of which you’ll find on our 5G phones page.

Read our full guide: 5G vs 4G: In-depth comparison

1.2 How does 5G work?

At a basic level 5G works in much the same way as 3G or 4G, in that mobile masts transmit radio frequency (and with it data) to your smartphone, providing the 5G connection which then allows you to transmit data off to other devices and the internet, using masts as a relay.

5G stands for ‘fifth generation’, so it’s just the latest version of that concept, offering higher speeds, lower latency, and other benefits compared to previous versions.

How it does that is largely through the use of higher frequency spectrum than we use for 4G or 3G. But that comes with its own challenges, as the higher the frequency of the spectrum, the less far it travels, which means 5G requires lots of ‘small cells’ – tiny infrastructure that fills in the gaps between masts.

That means new infrastructure is being built and there will be a lot more mobile infrastructure overall, but most of it will be discreet. There will likely be some major new masts too, but in many cases it will be possible to upgrade old ones to support 5G.

An assortment of other technologies are also involved in 5G, such as cloud technologies and Massive MIMO (multiple-input multiple-output), the latter of which allows the transmitting and receiving of numerous data signals simultaneously over the same radio channel, using a large number of antennas.

You can check out our Massive MIMO guide for a deep dive into this, but it all happens behind the scenes. As a user, you simply need a 5G-capable phone and a 5G plan, then you can connect in the same way as you would with 4G or 3

2. What are the benefits of 5G?

2.1 Much faster speeds

5G is of course much faster than 4G. Where 4G download speeds average around 32Mbps, on 5G you can currently expect average speeds of between 130-240Mbps, with peak speeds of over 1Gbps (where they generally top out at around 90Mbps on 4G), and speeds will improve ever more as 5G networks mature.

Network type

Average / Max download speeds

Time to download a full HD film



Over a day



Over 7 minutes



2.5 minutes


130Mbps-240Mbps/1-10Gbps+ (theoretical)

4-40 seconds

Read our full guide: How fast is 5G?

2.2 Lower latency / response times

Speed is the single most talked about advantage of 5G, but it’s not the only one, with low latency being another big factor, and one which ties into speed. Latency is how long a network takes to respond to a request, so if it’s high then it can take a while for things to happen even with good download speeds.

On 4G, latency averages around 35-50ms (milliseconds), while on 5G, the average is around half that currently and will go as low as 1ms ultimately.

Network type

Approx. latency (ms)

3G Network

65ms (actual)

4G Network

35-50ms (actual)

5G Network

21-26ms (actual) 1ms (theoretical)

You can probably imagine many of the differences these improvements can make in daily use, but below you’ll find some key examples, including both obvious applications and those you might not have considered.

2.3 Greater capacity for users

5G spectrum is available in greater capacities than 4G spectrum, which in turn means there’s more capacity for the end user, so a larger number of devices can be connected at high speeds. That in turn should make 5G more reliable than 4G.

The spectrum frequencies in use by both 4G and 5G can be seen below – note that not all networks use all of these frequencies, and that in general the higher frequencies have greater capacity available.

4G frequency spectrum

5G frequency spectrum










24GHz and higher



2.4 Improved reliability

As noted above, the greater capacity available to 5G will also help make it more reliable than older network technologies, meaning dropped calls should be a thing of the past, your network experience should be good even in busy places, and with that increased reliability, 5G will be suited to things where reliability is essential – such as self-driving cars and remote surgery.

2.5 More flexible

Some of the new technology in 5G allows for network slicing, which means a single physical network can be divided into numerous virtual networks suited to different needs, rather than having to rely on a one-size-fits-all network, which won’t be the ideal fit for many situations.

Read our full guide: What is network slicing?

3. Where is 5G available in the UK?

3.1 Which operators have launched 5G so far?

At the time of writing, the UK’s four main networks (EE, Three, O2 and Vodafone) have all launched a 5G service. A number of MVNOs (mobile virtual network operators) have too, namely BT Mobile, Tesco Mobile, Sky Mobile and VOXI – though they each rely on the coverage of one of the main networks.

Coverage on the main networks varies and is increasing rapidly, but most of the UK’s major cities now have at least partial 5G coverage on at least one of them, and many have coverage from all.

For example, Birmingham, Bristol, Cardiff, Glasgow, Leeds, Liverpool, London and Manchester all have a 5G footprint from all four main UK networks. You can see which networks have 5G coverage in a number of other key locations below.

3.2 Check 5G coverage in your area

The chart above only includes select locations, and even within those locations 5G coverage won’t initially be comprehensive, so it’s worth doing a proper check of coverage in your area. You’ll find a link to our coverage checker below, which lets you enter your postcode to find each network’s coverage in your area, and also contains in-depth details of each network’s 5G coverage across the UK.

5G Coverage Checker

Find out which networks have launched 5G in your area, or when it is coming to your area.

3.3 When will the rest of the UK get 5G?

The UK’s networks are rapidly expanding 5G coverage across the UK, but at the time of writing (April 2020) it will probably be years before 5G coverage rivals 4G.

Exactly when specific places will get 5G isn’t known for the most part, but as a general rule, the bigger and more urban a location the sooner it is likely to get it. You can check out our 5G coverage pages for the latest details on which locations will likely get 5G next.

4. How do I get 5G?

4.1 What do I need?

To get 5G you need three things: a 5G device, a 5G plan, and 5G coverage. Click the link below for an in-depth guide to getting 5G. Beyond that, you’ll find information on coverage above (and in our 5G coverage pages) and information on 5G phones and plans below.

Read our full guide: 5G upgrades - how to get 5G?

4.2 What 5G phones are available?

There’s a respectable and growing number of 5G phones available. These include the Samsung Galaxy S20 range, the Samsung Galaxy Fold 5G, the Samsung Galaxy Note 10 Plus 5G, the OnePlus 8 range, the OnePlus 7 Pro 5G, the Xiaomi Mi Mix 3 5G, and a number of others. Full details of available handsets can be found in the guide below.

Compare 5G phone deals

When will we see the iPhone 5G?

Apple is likely to launch a 5G iPhone in September 2020. Its iPhone 12 range is expected to land then and it’s heavily rumoured that one or more models will support 5G, though this isn’t yet confirmed, so there’s an outside chance you’ll have to wait longer, especially with Covid-19 potentially causing delays.

Read our full guide: When will iPhone 5G arrive?

4.3 Can I get a 5G SIM Only deal?

Absolutely. At the time of writing, EE, Vodafone, Three, O2, Tesco Mobile and VOXI all offer 5G SIM Only plans, and more networks are likely to start doing so over time.

Compare 5G SIM only deals

4.4 Is 5G broadband available?

Yes, you can get both 5G mobile broadband and 5G home broadband – the difference being that mobile broadband devices tend to be battery-powered and portable, whereas home broadband ones are designed to be plugged in and provide long-term broadband to your home.

One or both of these services is available on a number of networks, including EE, Three and Vodafone, and they’re worth investigating, as 5G broadband offers speeds that can rival fibre, coupled with a faster, simpler setup and potentially lower prices.

Compare 5G broadband deals

5. How will 5G change our lives?

5G will change our lives in a multitude of ways. We’re already seeing the early benefits of it, but there’s much more to come. First up, there’s some obvious benefits: with all that speed you can download content a lot faster, which in turn makes 4K, 8K and even higher resolution video far more viable, as when streaming it there’ll be minimal buffering, and when downloading you won’t have to wait an eternity.

5.1 5G gaming

Similarly, 5G could allow for far more graphically rich games on mobile, ones that truly approach console quality, as while the file sizes will be huge, 5G will be able to cope.

Of course, smartphone hardware might not be able to keep up with the demands of console-quality games, but it might not need to, as with 5G, game streaming will also be far more viable, meaning you’ll be able to stream the entire game over the internet, like you’re already used to doing with music and video.

This not only means you won’t need to download your games, but more importantly means all the processing can be done in the cloud, so you won’t need a high-end handset for otherwise demanding games. We’re already starting to see this with services such as Google Stadia.

The speed and especially the low latency of 5G will also transform online gaming, as no longer will there be any lag when playing on mobile. You can read more about this in our 5G gaming guide.

5.2 Virtual reality, augmented reality, and holograms

As well as higher resolutions, 5G will allow for better, more immersive virtual reality (VR) and augmented reality (AR) experiences, whether in gaming, live events, or a number of other things.

Imagine being able to be virtually present at a football match or the front row of a live concert, wherever you are, simply by donning a VR headset. With 5G this will be possible even when you’re not tethered to a fibre broadband connection, and the experience should remain smooth and immersive.

We will also see augmented reality displays projected over a car’s windscreen, highlighting businesses and potential hazards on the road ahead, or projecting direction arrows from your car’s sat-nav system. 4G isn’t fast or reliable enough to make this work effectively in most places, but 5G will be.

5G is also expected to usher in the era of holograms. Vodafone for example has already carried out a holographic call over 5G, with a live hologram of a footballer being projected across the UK, so they could have a conversation with a fan almost as if they were there in person.

The speed and latency of 5G can handle all the data required for that, and while we’re probably years off the required hardware being commonplace, this is one way 5G could transform your life in the future – making it seem like you’re in the same room as the person you’re talking to, even if they’re really at the other side of the world.

5.3 5G home broadband

Home broadband still isn’t in the state it should be, with many people still unable to get superfast connections, and even our fastest fibre speeds trailing some parts of the world, but 5G will provide a reliable, accessible alternative.

Since it has the potential to be every bit as fast as fibre broadband, places that have 5G coverage but only have slow broadband could benefit enormously by switching to 5G for their home internet. Some networks are already offering 5G home broadband in select locations, so it’s clear that this will be a major, transformative use of the tech.

The nature of 5G also means that 5G home broadband should be cheaper to install and maintain, and easier for users to set up in their homes, making it potentially cheaper and simpler than fibre broadband too. Check out our 5G vs fibre guide for more about this.

5.4 Remote working

5G remote working

Given that 5G could rival the speed of fibre broadband, it’s of course also ideal for remote working. Enabling you to work as if you were at home or the office wherever you are, even going so far as to let you take lag-free 8K video conference calls.

But that’s just the beginning. With 5G, construction workers will be able to operate excavators and cranes from thousands of miles away, doctors will be able to consult with patients and paramedics from afar, and surgeons could even control surgical robots remotely.

In these ways 5G could bring us all closer, and all but eliminate the work-day commute.

5.5 The Internet of Things

The Internet of Things (IoT) isn’t a new concept, but it has been rapidly growing over the last few years and with 5G becoming available it’s set to really take off.

The IoT encompasses all the ‘smart’ and connected devices we’re starting to see in homes and beyond, from smart light bulbs and thermostats, to connected kettles, security cameras and more, most of which can be controlled by an app on your phone, or by your voice when paired with an AI Assistant like Amazon Alexa.

In some cases they can even be automated, with lights for example turning on when you enter a room and turning off when you leave it. They do this in part by communicating with each other. For example, motion sensors at a room entrance could tell the lights when you’ve entered.

But it’s not just homes – we’re also starting to see the IoT connect cities, cars, health care, factories and more, to make life easier, smarter and more automated.

5G comes into this because its high speed and reliability along with its low latency is necessary to keep growing the IoT. Before you know it, almost every device that could possibly be connected will be.

5.6 Smart cities

Smart cities will in many ways be an extension of the IoT, taking these devices beyond homes and out into the world to make cities, well, smarter.

Think traffic lights that can adapt automatically based on traffic flow, automatic deployment of road repair vehicles when potholes are detected, smart power distribution, so buildings aren’t being lit when they’re empty, and rubbish bins that know when they need emptying and alert the relevant people, all leading to cleaner, safer, more efficient cities, and all with minimal human oversight.

This, even more than IoT devices in the home (which can often rely on fast fibre broadband), really needs the speed and coverage of 5G to work reliably.

5.7 Cars of the future

5G connected car

According to a report from Gartner (a research company), 94% of cars will be connected to 5G by 2028. With that they’ll then be able to communicate and share data with other vehicles and connected infrastructure, avoiding accidents and traffic as a result, and telling smart cities where traffic is building up, so routes for other vehicles can be adjusted.

That’s just a few ways a 5G connection will help cars of the future. They could also use it to power air quality sensors, in-car entertainment systems, AR dashboards, and even full vehicle automation.

That’s right, 5G could also play a large role in self-driving cars, with its speed and reliability key to them rapidly sending and receiving information about the road and other vehicles.

5.8 Drones

Drones have become quite popular in recent years, but 5G could massively increase their capabilities and safety.

One example of this is drone racing, with 5G allowing you to put on a virtual reality headset and get a drones-eye-view of the race, making it far more immersive than just controlling the drone from a little screen.

This, as with other VR, is a lot more viable over 5G due to the high speed, low latency and general reliability of the tech. With an inferior connection there could be a delay in your inputs and the view of the action, potentially causing you to lose the race or even crash the drone.

5G could also be the key to making drones safe enough to be operated beyond the pilot’s line of sight, as it is a speedy and stable enough tech to track all aircraft in an area, so there’s no danger of a collision.

6. FAQs

Will I need a new phone to get 5G?

If you’ve upgraded your phone relatively recently and opted for a 5G handset (which many of 2020’s flagships are) then you’ll be good to go, otherwise you will need a new phone.

The good news is that there’s a large and growing number of 5G phones, such as the Samsung Galaxy S20 5G and OnePlus 8, with many flagships now supporting the tech, but most lower end phones and older handsets don’t support 5G.

Over the coming years we’d expect 5G to start being supported as standard on new phones, but you’ll still need to upgrade if you currently have a 4G phone.

For full details on getting 5G-ready, check out our How to get 5G guide.

Is 5G safe?

The short answer is yes. There have been extensive studies into the effects of mobile phone usage and the radiofrequency (RF) fields that they give off, and no convincing evidence has been found that they affect health.

Most of these reports are for 4G and older tech rather than 5G, but the latter is a similar concept, just higher frequency, and talking about 5G specifically, the Department of Health and Social Care (reported by Ofcom) has said:

“Exposure to radio waves has been carefully researched and reviewed. The overall weight of evidence does not suggest devices producing exposures within current guidelines pose a risk to public health.”

Ofcom specifically has found that electromagnetic field (EMF) emissions from 5G are at most around 1.5% of the maximum safe level, while the ICNIRP (International Commission on Non‐Ionizing Radiation Protection) has spent seven years coming up with new mobile guidelines which will be followed to ensure all forms of 5G are completely safe.

The UK government meanwhile has added that:

"It is possible that there may be a small increase in overall exposure to radio waves when 5G is added to an existing network or in a new area. However, the overall exposure is expected to remain low relative to guidelines and, as such, there should be no consequences for public health."

For more in depth details about the safety of 5G, check out our ’How safe is 5G?’ guide.

Can I upgrade to 5G?

Absolutely – though if you’re currently tied into a contract you may need to wait for this to end.

Then it’s just a case of switching to a 5G phone and a 5G plan. Assuming you’re on a network which currently has 5G coverage you should be able to get both of these things without jumping through many hoops – you can just upgrade your plan as usual, opting for a 5G one this time around.

You can find full details of upgrading in our 5G upgrades guide.

Is Huawei involved in UK 5G networks?

As things stand Huawei will have limited involvement in the UK’s 5G networks – though there are those in government who want to further reduce or remove Huawei’s role.

Unless things change, the government has decided to let it and other ‘high risk vendors’ make up a maximum of 35% of 5G infrastructure in non-sensitive parts of the network, with no involvement in the sensitive areas.

In theory this should keep UK networks safe while allowing them to benefit from Huawei’s tech – which is better than most rivals and should help 5G networks roll out faster and more cheaply than if Huawei wasn’t involved.

However, there are now unconfirmed reports that the government has changed its mind and will rapidly phase out Huawei’s involvement in the UK’s 5G infrastructure.

For full details on Huawei’s 5G involvement, head to our latest Huawei 5G news.

Did 5G cause Covid-19?

No. The claims that it did are nothing more than conspiracy theories, with no basis in science. As noted above, 5G is safe, and it also doesn’t work in such a way that causing something like Covid-19 would even be theoretically possible.

Numerous experts and organisations have dismissed the links, with the UK’s four main mobile networks saying in a collective statement for example that “there is no scientific evidence of any link between 5G and coronavirus. Fact.” The Word Health Organisation meanwhile states that "5G mobile networks DO NOT spread COVID-19" as "viruses cannot travel on radio waves/mobile networks",

For more on this, check out our guide to whether 5G is dangerous or safe.

Will 5G be available in rural areas?

Yes. As with 4G you should ultimately be able to get 5G in most parts of the UK, whether urban or rural. However, again as with 4G it’s likely urban areas that will get widespread coverage first. Indeed, most of the places that currently have 5G are towns and cities.

This is to be expected, since more people can be given coverage in a smaller space, making roll outs in these areas a more efficient use of a network’s resources initially, but rural locations are sure to follow.

If you’re not sure whether you have 5G where you are now, make sure to check our 5G coverage pages and each networks’ official coverage page.

To see whether your area has 5G, head to our 5G coverage guides.

How will 5G impact businesses?

Potential benefits of 5G for businesses include new products and services and even whole new industries that just weren’t possible with 4G technology.

It will also aid in things like remote working, through things like 8K video conferences and holographic calls, along with allowing for smart and automated factories, driverless trucks, virtual reality tourism, improved engagement with products through augmented reality, remote and robotic surgery, and more.

Network slicing meanwhile could allow for networks that are tailored to the needs of individual businesses, and 5G could aid rural businesses, which are currently often stifled by poor network connections and slow broadband.

And these are just a few examples of 5G’s role in business.

For more on the benefits of 5G for businesses, check out our ‘How 5G will reshape business’ guide.

James Rogerson
About James Rogerson

Sub-Editor at 5G.co.uk

James is sub-editor at both 5G.co.uk and TechRadar. Also works as a researcher/ technical writer for 5G.co.uk and several other websites including TechRadar, T3, Smart TV Radar, 3G.co.uk with work on the web, in print and on TV.

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