Mobile Speed Test

Mobile Speed Test – Check Your 4G or 5G Speed in Seconds

Run this mobile speed test and in under a minute you will know exactly how fast your phone connection really is — not what the signal bars suggest, and not what your network advertises. The test above measures your live download speed, upload speed, ping and jitter right here in your browser, with no app to install and no account to create. It works on any phone and any UK network: EE, Vodafone, O2, Three, and every smaller provider that runs on them.

It is part of Speed Test UK, where you can check every part of your connection in one place. Before you press start, read the one warning that matters: a speed test can only measure the connection your phone is actually using. If your phone is on home Wi-Fi, you are testing your broadband, not your mobile data — and that single mix-up is responsible for more confusing results than everything else put together.

How to Run This Mobile Speed Test Properly

A fair test takes thirty seconds of preparation. Follow these steps and the result will be one you can trust and, if needed, quote to your network.

• Decide what you are testing. For mobile data, switch Wi-Fi off in Settings and check the 4G or 5G symbol appears at the top of the screen. For Wi-Fi, leave it on and stand where you normally use the phone.
• Check your data allowance first. This test moves real data — on a fast 5G connection a full run can use a few hundred MB. Fine on an unlimited or generous plan; worth a thought on a small allowance or while roaming abroad.
• Pause other activity. Stop downloads, cloud photo backups, hotspot tethering and streaming on the phone. Close heavy apps running in the background.
• Stand still, in the right place. Test where you actually use the phone — your desk, your sofa, your station platform. Then try once outdoors or by a window. The difference between the two is your signal story.
• Run it twice. Mobile speeds move around more than broadband speeds. Two or three runs across a few minutes give a fairer picture than one lucky or unlucky result.
• Note the context. Time of day, location, and whether you saw 4G or 5G. A small log like this is gold if you later raise a coverage complaint.

If you also want to check the connection your whole house runs on, our broadband speed test uses the same careful method for home connections.

What Your Mobile Speed Test Results Mean

Download speed

How fast data reaches your phone: web pages, TikTok and YouTube, Netflix on the train, app updates and map downloads. Download is the number networks advertise, and on mobile it varies enormously — the same phone can see 8 Mbps indoors and 180 Mbps standing outside the same building.

Upload speed

How fast data leaves your phone: WhatsApp and Teams video calls, sending photos and videos, posting to social media, live streaming and backing up your camera roll. Upload on mobile is usually a fraction of download, and it is the number that decides whether your video call looks sharp or blocky.

Ping

The time, in milliseconds, for a tiny signal to travel to a server and back. Under 40 ms on mobile data feels responsive for calls and gaming. Between 40 and 80 ms is normal for 4G. Regularly over 100 ms and games will lag and calls will talk over each other, whatever your download speed says. Check yours in more detail with our ping tester.

Jitter

How much your ping jumps around from moment to moment. Steady ping matters more than a low average: jitter above roughly 30 ms is what makes voices crackle and video freeze mid-sentence, even on a connection whose speed looks healthy.

What Is a Good Mobile Speed in the UK?

There is no single magic number — there is the right number for what you are doing, on the network generation you are actually connected to. Use this table as a plain-English guide to realistic UK expectations.

Two honest cautions. First, these are typical ranges, not promises: a rural 4G cell covering a wide area will sit at the bottom of its row, and a city-centre 5G result at midnight can beat the top of its row. Second, your phone matters. An older handset without the right 5G bands or carrier aggregation cannot reach the speeds a newer phone gets standing in the same spot.

4G vs 5G in the UK: What You Actually Get

Most “5G” in the UK today is 5G Non-Standalone, which uses a 5G radio signal anchored to a 4G core network. It delivers much faster downloads than 4G but only slightly better ping. 5G Standalone — a genuine end-to-end 5G network — is rolling out from Vodafone, EE and others city by city, and it is the version that brings the low latency 5G was always advertised with. If your phone shows 5G but your ping looks exactly like 4G, that is usually why.

Coverage is the other reality check. 5G is strong in city centres, around transport hubs and in many suburbs, and much patchier indoors, in rural areas and between towns. The higher-frequency signals that deliver the headline speeds do not travel far and struggle through walls — thick stone, modern foil-backed insulation and metallised window glass in newer UK homes are all effective signal blockers. 4G’s lower-frequency bands reach further and penetrate buildings better, which is why your phone often falls back to 4G indoors and why that 4G result can be perfectly usable.

Before judging your network, check what you should be getting at your address. The Ofcom mobile coverage checker gives an impartial view of predicted coverage from all four networks, and each network’s own checker shows its latest map. For a wider picture of how the UK networks perform nationally, Opensignal’s UK reports and the Ookla Global Index for the United Kingdom publish regular real-world measurements. If your results are consistently far below what coverage maps predict at your home, that gap — documented with dated tests — is exactly what a network’s support team needs to investigate.

Mobile Data vs Wi-Fi: Which Is Faster at Home?

Run this test twice: once on Wi-Fi, once with Wi-Fi off, standing in the same chair. The comparison tells you things neither result can alone:

• Mobile data much faster than Wi-Fi? Your broadband or home Wi-Fi set-up is the problem, not your phone. Test a laptop wired to the router, or read our guide to fixing home Wi-Fi coverage.
• Wi-Fi much faster than mobile data? You are in a weak mobile spot indoors. Calls over Wi-Fi Calling will usually beat calls over a one-bar signal.
• Both slow? The phone itself, a congested local area at peak time, or a plan limit may be involved. Test again at a quieter time and in a different location.

On a specific network? Our EE speed test page goes deeper on EE’s network and routers, and the same method works for every UK provider listed on our UK broadband providers hub.

Why Your Mobile Speed Changes From Street to Street

Mobile is not a wire. Your speed is shared with everyone connected to the same mast, shaped by how far away it is, what stands between you and it, and how many people are streaming around you. That is why a result at your kitchen table, at the station in rush hour, and in a field at the weekend can differ by a factor of twenty — with nothing broken anywhere.

The classic UK patterns: speeds sag between 7am and 9am and again from 4pm to 8pm as commuters and households pile on; trains cross dead zones between masts and drop to whatever the carriage windows let through (modern train glass is notoriously hostile to signal); and big events — football matches, festivals, New Year’s Eve — can flatten a local cell for hours. None of this appears in a coverage checker, and all of it appears in your test results.

Mobile Speed Test Not Working — Or Suspiciously Slow?

Work through these in order. They solve most “my mobile data is broken” mysteries without a support call.

• You are on Wi-Fi without realising. Phones reconnect automatically. Check the symbol by the clock before every run: Wi-Fi fan means broadband, 4G/5G means mobile data.
• One bar is one bar. If signal is weak, go outside or upstairs. If speed recovers, the building is the problem — use Wi-Fi Calling at home.
• A VPN is running. VPNs route your traffic through their servers and cap speed. Pause it for the test, then turn it back on.
• Your plan or allowance is the limit. Some tariffs cap speed, throttle after a fair-use amount, or slow hotspot traffic separately. Your network’s app will show what remains.
• The phone needs a nudge. Toggle aeroplane mode on for ten seconds to force a fresh connection to the nearest mast. Restart the phone if you have not in weeks.
• Background traffic is eating it. Photo backups, app updates and a cloud sync can swallow a modest connection whole. Pause them and test again.
• Network settings are stale. After changing provider or phone, a network settings reset (in your phone’s reset menu) clears out old carrier settings that can hold you back. It forgets saved Wi-Fi passwords too, so note them first.

If the test itself will not complete — hanging, erroring, or giving a wildly different number every run — try a different browser, and check whether ordinary pages load at all. A connection dropping in and out will fail tests exactly like this, and that pattern is itself worth reporting.

Frequently Asked Questions

Does this mobile speed test use my data allowance?

Yes — it measures your connection by moving real data, so it counts against your allowance. A run on a slow connection uses very little; a run on fast 5G can use a few hundred MB because there is simply more speed to measure. If your allowance is small, run it once rather than repeatedly, and think twice while roaming.

How do I test my mobile data and not my Wi-Fi?

Turn Wi-Fi off in your phone’s settings (not just in the quick panel on some Android phones — check the 4G or 5G symbol appears by the clock), then run the test. Afterwards, turn Wi-Fi back on and run it again in the same spot to compare the two honestly.

What is a good 5G speed in the UK?

Anywhere from 80 to 250 Mbps download is a typical, healthy 5G result in a UK town or city, with Standalone 5G areas going higher. What matters more day to day is that ping stays under about 40 ms and the speed does not collapse at peak times. A steady 100 Mbps beats a connection that swings between 400 Mbps and 5 Mbps.

Why is my 5G slower than my 4G was?

Usually because the 5G signal where you are standing is weak or on a distant cell, while the 4G signal is strong and close — a weak fast technology loses to a strong slower one. It can also happen on crowded 5G cells in city centres at peak times. Test in a few locations before concluding anything; if it is slow everywhere, check your plan includes full 5G access.

Why does my speed drop in the evening?

Congestion. Mobile capacity is shared, and evenings are when a whole neighbourhood streams at once. Full signal bars with slow speeds at 8pm that recover by 11pm is the classic signature. It is frustrating but rarely a fault — unless it is severe and constant, when a dated log of tests is worth sending to your network.

Can I use this test on a tablet, laptop or hotspot?

Yes. The test runs in any modern browser. On a laptop connected to your phone’s hotspot, it measures the whole chain — mobile signal plus the hotspot link — which is the honest number for working that way. Just remember hotspot traffic may have its own allowance or speed cap on some tariffs.

Test Your Mobile Speed Now — Then Test It Where It Matters

Scroll up, switch Wi-Fi off, and run the test where you are sitting. Then run it once more somewhere your phone usually struggles. Those two honest numbers — and the gap between them — tell you more about your mobile connection than any coverage map or advertisement. If both are healthy, relax. If both are poor wherever you go, you have the dated evidence you need for a proper conversation with your network. Either way, head back to Speed Test UK whenever you need a fresh measurement.