Is 5G really better than 4G? What UK evidence actually shows
On average, yes: UK measurements favour 5G for download and upload performance. But 4G and 5G both support ordinary smartphone tasks, and a national average is not a speed promise for your street or your particular SIM.
In its Mobile Matters 2026 research, Ofcom analysed more than 225 million crowdsourced data points gathered between August 2025 and July 2026. A connection met its good-performance threshold when measurements achieved at least 5Mbps download, 1.5Mbps upload and no more than 50 milliseconds one-way latency. The resulting average score was 78% for 4G and 92% for both 5G non-standalone and 5G standalone. Published on 16 October 2026, these figures describe measured performance where there was mobile connectivity. They are not geographical coverage percentages, guaranteed speeds or the odds that your individual SIM will work at a particular address. Read Ofcom's Mobile Matters research.
There is a practical reason for the difference: modern 5G networks can provide greater capacity and higher transfer rates. For the small files Ofcom tested (2MB and 5MB downloads and 1MB uploads), transfers took around twice as long on 4G as on 5G in its observations. This is not a claim that every large download, device or individual connection will be twice as fast. But getting an internet connection and completing a video stream were already generally successful on both, which helps explain why many customers with good 4G may not notice a dramatic improvement in everyday use.
| What you do on your mobile | What good 5G might improve | Why 4G may already be enough |
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| WhatsApp messages, emails, maps and banking | A little extra responsiveness in some circumstances | These tasks normally need modest bandwidth |
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| Music, podcasts and scrolling | Faster loading of heavier content | Playback is usually smooth once the connection is stable |
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| Watching HD video | More headroom, particularly at busy times | A stable 4G connection can comfortably stream video |
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| Downloading a large app or offline film | Potentially a much shorter wait | If you download rarely or mostly over Wi-Fi, the gain matters less |
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| Using a laptop hotspot or video meetings | Potentially better upload capacity and less congestion | Good 4G with a consistent upload is sometimes more useful than fluctuating 5G |
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| Multiplayer games and live calls | Lower delay in favourable conditions | Latency stability, packet loss and the remote server matter, not just the 5G icon |
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What the evidence does not prove: that one particular 5G tariff will beat another network's 4G service everywhere, or that a branded 5G+ plan automatically brings a noticeable everyday improvement.
A large download makes the difference easy to understand
Imagine downloading the same 1GB file over mobile data, with each connection holding a constant speed throughout. These are illustrative speeds, not official averages for 4G or 5G:
| Sustained download speed | Theoretical time to download 1GB |
|---|
| 25Mbps | Around 5 minutes 20 seconds |
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| 100Mbps | Around 1 minute 20 seconds |
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That is a four-minute saving on one large transfer. If you regularly download sizeable work files, it can be useful. If you mainly read messages and make payments, it may be almost invisible. The calculation assumes 1GB = 1,000MB, eight bits per byte and no connection overhead; real downloads take longer and speeds vary.
The point is not that 4G equals 25Mbps or 5G equals 100Mbps. Neither claim follows from the generation alone. What matters is the speed your phone can sustain on the network and tariff you can actually use.
The first buying test: is the right network available where you need it?
You can have a 5G-compatible phone and tariff yet spend much of the day on 4G. Your handset may use 5G outside a railway station and switch back to 4G indoors, or show a strong 5G connection in one part of town but have weak coverage on a familiar rural journey.
Ofcom's Map Your Mobile checker compares predicted outdoor and indoor 4G/5G coverage for the four underlying UK networks. It also provides wider-area performance information. This is a useful starting point, not a live indoor signal guarantee. Walls, building materials, mast position, network congestion and the radio hardware in your phone all affect the outcome.
A quick, low-risk way to shop is:
- Check the underlying network for your postcode, workplace and places you visit regularly. An MVNO's brand name is not necessarily the name of its host network.
- Look for real experience, especially inside buildings and during your usual commuting hours. A coverage prediction cannot replace actual use at those locations.
- Check the exact SIM product, including whether it includes 5G access and any published Mbps cap or special 5G+ eligibility.
- Only then compare price, data and contract length. If the underlying network works well, an alternative provider using it may offer better value without forcing a coverage gamble.
In DealPriceCheck's SIM-only catalogue, the network filters and Keep My Signal option can help you compare other operators on a familiar host network. They do not measure your local signal, prove an MVNO has identical 5G access or guarantee equal speeds. If voice calls are poor indoors despite reasonable broadband, check whether your existing provider and phone support Wi-Fi Calling before paying for a new 5G plan.
Why a better 4G network can beat a poor 5G network
Suppose Network A shows 5G outside your flat but struggles to maintain service indoors, while Network B gives you dependable 4G at your desk. For calls, online payments, meetings and navigation, Network B may be the better everyday choice — even if a speed test outdoors makes A look impressive.
This is a decision example, not a statement about EE, O2, Vodafone or Three in any specific town. Check the networks at your own address rather than treating a nationwide ranking as an instruction to switch.
The second buying test: does your phone and plan actually support 5G?
A working 5G connection normally requires three things at the same time: a 5G-capable handset, a tariff/provider with the appropriate 5G access enabled, and compatible coverage. Device software, settings and operator activation may also matter.
A 5G-ready SIM-only plan can normally work in a 4G-only smartphone — the phone simply stays on the mobile network technology it supports. That means you can often choose a good-value 5G tariff now and keep your existing 4G phone until you genuinely need to replace it.
Equally, owning a 5G phone does not make every SIM-only contract 5G-enabled. Some legacy or specialist plans and some advanced 5G services have additional conditions. Check the service provisioned on your actual account.
Before buying hardware, check your phone's specifications, preferred mobile-network setting and whether a software update is needed. Ask your current operator whether you already have 5G access: you may not need a new physical SIM, eSIM or contract at all. An old SIM or unusual device can have exceptions, so let your provider confirm compatibility rather than ordering a replacement unnecessarily.
Is eSIM part of the 5G upgrade?
No. eSIM is a way to activate your mobile account without a removable plastic SIM; 5G is the radio network technology. An eSIM does not make a 4G handset 5G-capable, and choosing a physical SIM over eSIM does not inherently lower your maximum radio speed. If digital activation matters to you, our guide to UK networks supporting eSIM covers that distinct choice.
The third buying test: is your 5G plan actually allowed to run fast?
The 5G badge means a network technology is available to the tariff. It is not a guaranteed download speed. An operator can set a plan-level ceiling on maximum data speed, even for a package labelled 5G or unlimited. And a connection can be slower than the cap when the mast is busy or the signal is weak.
This matters when you are comparing a low-cost 5G SIM with a higher-priced plan on the same network. Paying more may buy more data, flexibility, roaming, or an enhanced-network feature — but not necessarily an observable speed increase.
Look for four different terms rather than treating them as interchangeable:
| Label in a deal | What it actually answers |
|---|
| 5G included | Can this tariff access ordinary 5G where supported? |
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| Maximum speed or speed cap | Is there a published ceiling in Mbps? |
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| Data allowance — 10GB, 100GB or unlimited | How much data can be transferred during the allowance period? |
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| 5G+, 5G Standalone or a premium option | Is a further network capability offered, and what handset, plan and location conditions apply? |
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Ofcom's October 2026 research found that 5G Standalone was not yet materially outperforming non-standalone 5G in its download or upload observations. This does not rule out other standalone capabilities or later improvements. A newer 5G label therefore does not by itself establish a better experience on your handset. Read the particular service's benefits and eligibility before accepting an added premium. For detailed speed-ceiling examples, use our UK SIM speed caps explainer.
What is 5G worth paying for? Compare the full SIM cost
If two equally suitable deals use a network that works well for you and 5G costs no more, take the 5G option. There is little reason to refuse a useful capability that is included. The harder question arises when 5G comes with a higher bill, a different underlying network, or a longer commitment.
Imagine two otherwise suitable SIM deals with the same coverage, data allowance and commitment, but different overall prices. The higher-priced plan also gives you a 5G-related benefit that you would actually use. These are hypothetical differences between whole-plan prices, not current operator prices or an extra fee that all networks charge for ordinary 5G:
| Extra price for 5G | Additional cost across 12 equal monthly payments | Buyer's question |
|---|
| £0 | £0 | Why give up the 5G option if coverage and terms are good? |
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| £2 per month | £24 | Will faster downloads or tethering improve your routine enough to justify it? |
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| £5 per month | £60 | Is the improvement verified where you use the phone, rather than merely advertised? |
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These totals only apply if the assumed difference stays fixed over twelve equal monthly payments. Many UK SIM-only deals already include ordinary 5G without a separate premium; some enhanced services branded 5G+ have additional eligibility or charges. Do not pay more for a different data allowance, roaming benefit or longer contract and mistakenly attribute the whole increase to 5G. A real plan can have introductory rates, annual changes, upfront costs or 30-day rather than calendar-month renewals. Compare full payment schedules over the same time horizon, including the price after any promotion and exit charges.
One more often-overlooked calculation is the cost of changing your handset. If you own a reliable 4G phone and only want 5G for occasional downloads, buying a new phone can cost far more than the saving or performance advantage from a different SIM. If you were replacing the phone anyway, 5G support may be a useful feature without creating a separate upgrade expense.
What if the cheapest suitable deal already has 5G?
That can be the easiest outcome. You do not need to find a special 4G-only plan just because you have a 4G phone: a compatible 5G SIM-only tariff can use 4G today and give you a path to 5G on a later handset.
Start with the live 5G SIM-only deals comparison for selected offers across several UK networks. Compare that with all SIM-only deals using the same data allowance and term. The listings give you current purchase routes through their existing View Deal buttons and the underlying Full plan details pages.
Two partner routes to consider — without assuming either will be fastest
It can be commercially sensible to check a lower-cost provider running on an underlying network you already trust. But paying less or more does not establish the speed a SIM will achieve indoors, whether it has access to 5G Standalone, or whether every feature matches the host operator.
1pMobile (EE network). The operator's published ordinary Boost range includes 5G without a separate speed-cap upgrade fee, although its unlimited package has its own fair-use condition. If EE's underlying coverage works for you, compare 1pMobile's current UK plans on DealPriceCheck. Its official UK range includes 5G-compatible plans, and you can browse 1pMobile products through our confirmed Awin affiliate link. The affiliate link opens the operator's general products listing, not a guaranteed checkout for a particular 5G plan.
Lyca Mobile (EE network). Lyca advertises 5G as included on eligible UK SIM-only products, so the first question is whether the specific package suits your data needs and renewal budget — not whether you must pay a separate fee merely to enable ordinary 5G. You can compare Lyca's current deals on DealPriceCheck and view Lyca's cheap SIM-only range through our confirmed Awin affiliate link. That is a general range, not a product-specific 5G checkout. If EE reception is poor at your address, an EE-based alternative may not resolve your problem: check the other host networks in the live comparison instead.
For a different host network, DealPriceCheck also lists qualifying plans from providers such as Lebara and Sky Mobile. Follow the existing live product's affiliate View Deal where applicable; do not infer identical network features or speed from its 5G badge.
The aim is not to pick whichever provider pays a commission. It is to help you choose an appropriate network and plan then follow a relevant purchase route. A deal that is cheap but unusable at home is not good value.
Does 5G use more data or drain the battery faster?
Data: Transferring the same file uses approximately the same amount of data whether your phone connects by 4G or 5G. However, the faster connection may encourage higher video resolution, bigger downloads and more hotspot use. Those changes in behaviour can increase the amount you consume. Compare your real mobile-data history with our guide to how much mobile data you need rather than buying an oversized allowance simply because a SIM says 5G.
Battery: There is no universally correct percentage penalty for using 5G. Modem efficiency, software, signal strength, whether the phone switches repeatedly between 4G and 5G, and what apps are doing all affect power use. Some phones consume more power in weak 5G coverage; in other situations a faster transfer finishes sooner. If battery life is your problem, test your own device's automatic/4G-only network settings when available before treating a different tariff as the cure.
When 5G matters most: three buying situations
Your phone is also your laptop's internet connection
Tethering moves the question from whether a message loads quickly to whether you can handle cloud backups, file uploads, calls and several connected devices at once. Strong 5G can help, but consistent upload speed and stability can matter more than a momentary high download result. Check whether tethering and the device you intend to connect are allowed on the tariff. Our hotspot and tethering SIM guide deals with that equipment and usage choice.
You live somewhere with patchy mobile coverage
A supposedly faster network can be worse if it rarely reaches your home or regularly drops back to a very weak connection. Check Ofcom and the operator's coverage information, then prefer a network with dependable real reception. If two providers use the same host radio network, changing brand alone is not a guaranteed way to repair the underlying coverage problem.
You already have a good 4G phone on a cheap plan
Before paying to upgrade, ask: What fails today? If nothing is slow enough to matter, 5G may be optional. You can still choose a well-priced 5G-enabled SIM if it is better on total cost and terms; it should operate over 4G in a compatible 4G handset. But don't pay for a new handset merely because you think a 5G SIM card alone will unlock a faster signal.
Your five-minute checklist before ordering a 5G SIM-only deal
- Check your phone. Is it genuinely 5G-capable, and is 5G already enabled on your account?
- Check the network. Compare outdoor and indoor 4G/5G coverage where you need it, then look for actual local experience.
- Check the tariff. Is ordinary 5G included? Is there a maximum-speed limit or extra charge for 5G+?
- Check usage and cost. Choose a realistic data allowance, price every payment and consider the minimum term.
- Use the correct purchase path. Choose the exact offer in the DealPriceCheck 5G catalogue, open Full plan details if you need the extra information, then View Deal when ready to buy.
If the same affordable tariff is 5G-ready, the decision may be straightforward. If a different plan is being sold mainly on a bigger peak-speed claim, demand a meaningful improvement for the places and activities that matter to you.
Questions about 4G and 5G SIM-only deals
Is a 5G SIM worth getting in the UK?
Yes when 5G is included at a sensible price and you can use it. It can improve downloads and capacity, particularly for large files and tethering. If your current 4G works well and a 5G plan would cost significantly more, there may be little practical reason to pay extra.
Will a 5G SIM work in my 4G phone?
Normally yes. A compatible 5G-enabled SIM-only plan can connect over 4G in a phone that lacks 5G hardware. You will not get 5G speeds unless you change to a compatible handset and have eligible coverage and service.
Is 5G always faster than 4G?
No. It is generally faster in UK-wide measurements, but a weak or speed-capped 5G connection may be slower than a strong 4G connection. Local radio conditions, network capacity, the handset and plan limitations all affect the result.
Does 5G cost more than 4G SIM-only?
Not necessarily. Many current UK SIM-only offers include 5G without a separate charge. Compare the same data, contract and underlying network before concluding that a higher bill is caused by 5G access alone.
Can I use 5G if there is no 5G coverage at my address?
Not at that location. A compatible phone will ordinarily use available 4G coverage instead. A 5G-ready SIM cannot produce a 5G connection where its provider does not offer a usable one.
Does 5G use more of my data allowance?
Not simply because of the radio technology. The same content transfers broadly the same amount of data. Streaming in higher quality or downloading more content because the connection is faster can raise your actual usage.
Is 5G the same as 5G Standalone or 5G+?
No. Ordinary 5G often uses non-standalone architecture alongside existing 4G systems, while standalone 5G uses a 5G core. Commercial 5G+ branding varies, so verify device, tariff and location eligibility. In Ofcom's 2026 observations, standalone 5G did not consistently outperform non-standalone 5G in download or upload performance.
Is 5G better for video calls and gaming?
It can be if it provides more consistent upload and lower delay, especially under load. But a stable 4G connection can outperform variable 5G for real-time activity. Download speed alone is not enough to assess either.
Do 1pMobile and Lyca get the same 5G speeds as EE?
They use EE's underlying radio network, but the same host does not prove identical maximum speeds, advanced 5G eligibility or every account feature. Check each tariff's published conditions. If a speed limit is not documented in the live DealPriceCheck card, do not assume one is present or absent; check the operator’s terms for the exact product.
Should I change my mobile network to get 5G?
Only if another underlying network gives you a better usable connection or a materially better deal. If your existing network and handset already support 5G, you might only need an eligible plan or a settings change. If coverage is weak, compare local reception before moving; a new provider on the same host network may not solve it.
Bottom line: Choose the best usable network and overall SIM deal, not the biggest 5G claim. Take 5G when it is available on fair terms, especially if you frequently download or tether. Keep good 4G if it meets your needs and the supposed upgrade would cost too much. Check current live offers before buying.
DealPriceCheck compares selected UK mobile providers and may earn commission on qualifying partner links. Coverage, speed restrictions, 5G features, prices, promotions and contract terms depend on the specific tariff and can change; confirm the exact offer before ordering.