What is 5G?
5G is the fifth generation of mobile network technology. It delivers faster speeds, lower latency and far greater capacity than 4G — but the experience varies enormously depending on where you are and which network you're on.
How 5G Works
5G uses radio waves to transmit data wirelessly between a mast and your device — exactly like 4G. What makes 5G different is the range of radio spectrum it uses, the more advanced antenna systems (MIMO — multiple-input multiple-output), and a redesigned network architecture that reduces delays.
Radio spectrum is measured in frequency (hertz). Higher frequencies can carry more data but travel shorter distances and struggle to penetrate solid objects. Lower frequencies travel further and pass through walls more easily but carry less data. 5G is the first generation designed to operate usefully across all three tiers of spectrum simultaneously.
Illustration — 5G Spectrum Bands
Wide rural and suburban coverage. Penetrates buildings well. Used by all four UK networks for their 5G expansion.
The UK sweet spot — decent range with genuinely fast speeds. Most city and town 5G in the UK operates on mid-band.
Extraordinarily fast but very short range. Cannot penetrate walls. Limited to dense urban hotspots; rare in the UK currently.
Bar width = approximate coverage range. Speed figures are theoretical maximums; real-world is typically 30–50% of peak.
New Radio (NR) — the 5G standard
5G uses a technology standard called New Radio (NR), defined by the 3GPP (3rd Generation Partnership Project). NR introduces several technical advances over 4G LTE:
- Massive MIMO: masts use dozens or hundreds of small antennas simultaneously, directing signals precisely at devices rather than broadcasting in all directions. This multiplies capacity and reduces interference.
- Beamforming: the mast tracks your device and concentrates the signal beam towards it, improving signal quality at the edges of coverage.
- Network slicing: operators can divide the network into virtual slices with different characteristics — a high-reliability slice for emergency services, a low-latency slice for autonomous vehicles, a high-bandwidth slice for video streaming.
- Standalone (SA) vs Non-Standalone (NSA): most UK 5G currently runs in NSA mode, which uses the existing 4G core network for some functions. Standalone 5G — which unlocks the full potential of the technology, including true sub-1ms latency — is beginning to roll out across UK networks from 2024 onwards.
5G vs 4G — What's Actually Different?
The differences between 5G and 4G go beyond raw speed. Here's what changes in practice:
Illustration — Typical Download Speeds
Real-world speeds. mmWave figures require line-of-sight to a nearby mast.
Speed
4G LTE typically delivers 20–80 Mbps in real-world UK conditions — enough to stream HD video, video call, and browse with ease. Mid-band 5G typically delivers 150–400 Mbps in normal use. That's fast enough to download a full HD film in under two minutes rather than ten. In practice, for most everyday tasks, you won't notice the difference — but congested areas (train stations, concerts, football grounds) benefit dramatically.
Latency
Latency — the time between sending a request and receiving a response — is typically 30–60ms on 4G. 5G targets under 10ms, and current UK deployments typically achieve 15–25ms. For most web browsing and video calls, this makes little perceptible difference. For real-time gaming, financial trading, remote robotics, and future autonomous vehicle systems, the reduction is significant.
Capacity
This is where 5G makes its most transformative impact. 4G masts can handle roughly 100,000 connected devices per square kilometre. 5G, using Massive MIMO, can theoretically support 1 million connections per km². In practice, this means events where 4G networks collapse under load — festivals, sports grounds, city centres at rush hour — should remain functional on 5G.
5G in the UK — Coverage and Networks
EE launched the UK's first commercial 5G service in May 2019, initially in parts of London, Birmingham, Cardiff, Edinburgh, Belfast and Manchester. O2, Vodafone and Three followed later that year. By 2024, all four major UK networks offer 5G coverage in most UK cities, with mid-band 5G extending into many large towns and low-band 5G reaching increasingly rural areas.
Coverage quality varies significantly by network and by location. These are the broad characteristics of each UK operator's 5G approach:
| Network | Leading metric | 5G notes |
|---|---|---|
| Three | 5G | Leads on 5G reach in city centres; 100% of new sites 5G |
| EE | 4G & 5G | Largest overall footprint; strong rural 5G via 700 MHz |
| Vodafone | 5G urban | Fast urban 5G; 700 MHz rollout expanding coverage |
| O2 | 4G indoor | Best 4G indoor scores; 5G growing steadily |
The best way to know which network has 5G at your specific address is to search your postcode. Network self-reported coverage maps show theoretical projections from their engineering models — they don't capture real-world interference, indoor signal loss, or how congested the nearest mast is.
Do You Need a 5G Phone?
Yes — 5G access requires a device with a 5G modem chip. Software updates cannot add 5G capability to an existing 4G handset. However, almost all flagship smartphones released since 2020 include 5G, and most mid-range phones from 2021+ also support it. If you bought your current phone in 2021 or later, it is likely 5G-capable.
Key things to check when buying a 5G phone for the UK:
- Sub-6 GHz support: all UK 5G currently operates below 6 GHz (low and mid-band). Any 5G phone sold in the UK will support this.
- n28 (700 MHz) and n78 (3.5 GHz): these are the most common UK 5G bands. Check your handset supports both for maximum coverage flexibility.
- Battery performance: 5G modem efficiency has improved significantly. Phones from 2022+ have no meaningful battery penalty for 5G use.
Does 5G drain battery faster?
Early 5G chips (2019–2021, particularly first-generation Snapdragon X50 modems) did increase power consumption noticeably. Current generation modems — Snapdragon X75, MediaTek M90, Samsung Exynos 5300 — are significantly more efficient. In controlled tests, modern phones show 5–10% greater battery drain on 5G vs 4G, and because data transfers complete faster on 5G, the total energy used per task is often comparable or lower.
What Can 5G Do That 4G Can't?
For individual consumers in 2024, the main practical benefits of 5G over 4G are:
- Reliable connectivity in crowded places: festivals, sporting events, busy train stations, city centres at rush hour
- Faster large file downloads: app updates, software downloads, high-resolution video files
- 4K and 8K streaming without buffering: particularly on mid-band 5G with consistent 200+ Mbps
- Home broadband replacement: fixed wireless access 5G delivers 100–500 Mbps at home without a fixed-line installation
- Low-latency mobile gaming: online gaming with lag comparable to home WiFi
Longer-term, 5G enables industrial and infrastructure applications at scale: connected factories, remote surgical robotics, autonomous vehicles, smart city sensor networks, precision agriculture. These are being deployed in limited contexts now and will expand as standalone 5G networks mature.
5G Myths and Misconceptions
Is 5G the same everywhere?
No. 5G is a standard, not a fixed specification. A "5G" signal from a low-band 700 MHz mast delivers speeds only modestly above 4G. A mid-band 3.5 GHz 5G connection in a city centre can deliver 400+ Mbps. Both show "5G" on your phone's status bar. This variability is one of the most frequently misunderstood aspects of the technology.
Does 5G work indoors?
It depends on the spectrum band. Low-band 5G (700–900 MHz) penetrates buildings similarly to 4G. Mid-band 5G (3.5 GHz) has moderate indoor penetration — noticeably worse than 4G through thick walls or in basements. mmWave 5G cannot penetrate most building materials and is essentially an outdoor-only technology. Most UK indoor 5G comes via low or mid-band.
Frequently Asked Questions
Is 5G available where I live?
5G coverage depends on your network and location. All four UK networks — EE, O2, Vodafone and Three — offer 5G in most major cities and many towns. Rural coverage is improving as low-band 700 MHz 5G rolls out. Enter your postcode above to check exact coverage at your address.
How fast is 5G in real life?
In real-world UK conditions, mid-band 5G (the most common type) typically delivers 100–400 Mbps downloads. Low-band 5G is closer to 30–100 Mbps. mmWave 5G, found only in very dense urban hotspots, can exceed 1 Gbps. By comparison, 4G typically delivers 20–80 Mbps.
Does 5G use more battery than 4G?
Early 5G phones (2019–2020) did have higher battery drain when on 5G. Modern devices use much more efficient modem chips. In practice, connecting to 5G on a current handset uses comparable battery to 4G — and because data transfers complete faster, total energy use is often lower.
Do I need a new phone for 5G?
Yes. 5G requires a compatible modem chip in your device — your existing 4G phone cannot access 5G networks via a software update. Most flagship phones from 2020 onwards include 5G, and many mid-range handsets from 2021+ also support it.
Will 5G replace my home broadband?
For some households, fixed wireless access (FWA) 5G broadband is already a viable alternative to fibre. Three, EE, Vodafone and O2 all offer 5G home broadband products. Whether it suits you depends on the 5G signal strength at your specific address and your usage patterns.
Is 5G safe?
5G uses non-ionising radio waves — the same category as FM radio, WiFi and existing 4G. All UK 5G deployments must comply with International Commission on Non-Ionizing Radiation Protection (ICNIRP) guidelines, which have large safety margins built in. There is no credible scientific evidence of harm from 5G at permitted power levels.
Which UK network has the best 5G?
It depends what you mean by 'best'. Three consistently leads on 5G availability in city centres and has committed to 5G on every new site. EE has the broadest geographic 5G reach due to its 700 MHz rollout. Vodafone and O2 have strong urban 5G but lag on rural reach. Check your specific postcode using the search above for a local verdict.
What is the difference between 5G and 5G+?
Some carriers (especially in the US) label mmWave 5G as '5G+' or 'Ultra Wideband'. In the UK, the distinction is less commonly marketed. What matters is the underlying spectrum band: mid-band 5G (3.4–3.8 GHz in the UK) is the standard experience; mmWave adds extremely high speed in very limited locations.
Check 5G at your postcode
See which network leads for outdoor 5G, indoor 4G and overall coverage at your exact address.