5G vs 4G: Real-World Speed Tests Across the UK
You've heard the marketing claims: "5G is 10 times faster than 4G." But what does that actually mean when you're standing on a street corner in Manchester, commuting through London, or streaming in your living room in Glasgow? We've dug into the real-world data from independent testing organisations and network operator reports to bring you a clear, no-nonsense picture of what 5G actually delivers — and how it compares to good old 4G in everyday use.
The Numbers: 5G vs 4G Download Speeds
According to Ofcom's most recent Connected Nations report, the median 5G download speed experienced by UK consumers in urban areas is approximately 190 Mbps, compared to a median 4G speed of around 28 Mbps. That's a near seven-fold improvement.
However, averages don't tell the full story. Independent testing by RootMetrics across 16 major UK cities found significant variation between networks and locations. Here's a snapshot of real-world download speeds recorded during their H1 2026 testing:
| City | EE 5G | Vodafone 5G | Three 5G | O2 5G | Average 4G |
|---|---|---|---|---|---|
| London | 250 Mbps | 185 Mbps | 220 Mbps | 140 Mbps | 35 Mbps |
| Manchester | 210 Mbps | 160 Mbps | 195 Mbps | 125 Mbps | 30 Mbps |
| Birmingham | 195 Mbps | 150 Mbps | 180 Mbps | 115 Mbps | 28 Mbps |
| Glasgow | 180 Mbps | 140 Mbps | 170 Mbps | 105 Mbps | 26 Mbps |
| Cardiff | 165 Mbps | 130 Mbps | 155 Mbps | 100 Mbps | 24 Mbps |
As you can see, even on the "slowest" 5G network (O2), you're getting roughly 3–4 times the speed of a good 4G connection. On EE — consistently rated the fastest UK 5G network — you can expect nearly eight times the 4G performance.
Peak Speeds: How Fast Can 5G Really Go?
While averages are useful, 5G has shown remarkable peak speeds in real-world testing. RootMetrics recorded peak download speeds exceeding 750 Mbps on EE's 5G network in central London, and over 600 Mbps on Three's network in Birmingham. These aren't lab conditions — they're actual consumer-level readings taken on commercially available handsets like the Samsung Galaxy S25 Ultra and iPhone 16 Pro.
For context, a 750 Mbps connection can download a full 4K movie (roughly 20 GB) in just over three and a half minutes. On a typical 4G connection at 30 Mbps, that same download would take nearly an hour and a half.
Latency: The Hidden Superpower of 5G
Raw speed gets all the headlines, but latency — the time it takes for data to travel from your device to the network and back — may be 5G's most important upgrade for everyday use. 4G networks typically deliver latency in the 40–60ms range. 5G, on the other hand, routinely achieves 10–20ms, with standalone (SA) 5G deployments pushing that down towards single-digit figures.
What does lower latency actually mean for you?
- Cloud gaming: Services like Xbox Cloud Gaming and GeForce Now become genuinely playable on mobile. At 15ms latency, fast-paced games like Call of Duty: Warzone Mobile feel responsive rather than sluggish.
- Video calls: That awkward delay where people talk over each other on Zoom or FaceTime largely disappears.
- Web browsing: Each page request involves dozens of round trips to servers. Lower latency means pages "pop" into view noticeably faster, even if total download speed is similar.
- Real-time apps: Live sports betting, stock trading, and collaborative editing tools all benefit from near-instantaneous response times.
What About Upload Speeds?
Upload speeds are the often-overlooked part of the 5G equation — and they matter more than ever in an era of TikTok, Instagram Reels, and remote work. 4G upload speeds typically hover around 8–12 Mbps. 5G uploads average 30–50 Mbps across UK networks, with Three and EE regularly hitting 80+ Mbps in strong signal areas, according to independent testing by Opensignal.
This makes a huge difference if you regularly upload videos to social media, back up photos to cloud storage, or send large work files from your phone. A 200MB video that takes two minutes to upload on 4G can be sent in under 20 seconds on a good 5G connection.
5G vs 4G for Streaming
For video streaming, the difference between 4G and 5G is less about picture quality (a stable 15 Mbps connection can comfortably stream 4K) and more about reliability and consistency. On a busy 4G cell — think a packed train station or stadium — speeds often drop well below the threshold needed for smooth 4K playback. 5G networks handle congestion far better, meaning your Netflix or YouTube stream stays crisp even in crowded environments.
Spotify and Apple Music listeners won't notice much difference (audio streams are tiny), but if you're into lossless or hi-res audio streaming (Tidal, Apple Music Lossless), 5G gives you headroom to stream at the highest bitrates without buffering.
Downloading Games and Apps
Modern mobile games can be enormous — Genshin Impact clocks in at over 25 GB, and Call of Duty: Mobile regularly exceeds 15 GB with all assets downloaded. On a 30 Mbps 4G connection, downloading Genshin Impact takes around two hours. On 5G at 200 Mbps, it takes approximately 17 minutes. For anyone who's ever been stuck waiting for a game to download so they can play with friends, this alone justifies the 5G upgrade.
The Bottom Line
The real-world speed gap between 5G and 4G in the UK is dramatic — roughly 5–8 times faster on average and up to 20 times faster at peak. Add in dramatically lower latency and better congestion handling, and 5G doesn't just feel a bit faster than 4G; it transforms what mobile connectivity can do. Whether you're a gamer, streamer, remote worker, or just someone who hates buffering, the upgrade is well worth it — especially since 5G plans now cost the same as 4G plans across most UK networks.
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Disclosure: We may earn commission from links on this page. Speed data based on publicly available reports from Ofcom, RootMetrics, and Opensignal as of July 2026.