United Kingdom · SIM-only
Compare selected UK 50GB SIM-only deals by price, network, contract length, 5G, eSIM and roaming. Fifty gigabytes can cover regular mobile streaming and occasional hotspot use, but the right plan depends on what you pay after a promotion and how easily you can switch. Check the live cards first; the buying guidance is below.
No current offers match these filters.
The best 50GB SIM is the one that gives you dependable coverage and the lowest sensible ongoing cost for the time you intend to stay. The lowest first payment is not necessarily the cheapest plan. Paying more for the same data can be reasonable if the cheaper network does not work where you need it.
Start with the deals above. Each card represents an exact 50GB allowance in DealPriceCheck’s monitored dataset, not every available offer in the entire UK market. Filter by the network or contract length you can actually use. Then open Full plan details to check the normal price, introductory period, minimum commitment, roaming and eSIM. Use View Deal to confirm eligibility and terms with the provider when you are ready to buy.
| Your priority | The question to ask before choosing |
|---|---|
| Lowest cost over time | What will I pay after any discounted months, not just today? |
| Flexibility | Am I happy to commit for 12, 18 or 24 months, or do I need a rolling plan? |
| A reliable signal | Does this plan’s underlying network work at home, at work and on my regular journeys? |
| Holidays abroad | How much of the 50GB is actually included in my destination? |
| Using another device | Does the provider permit the tethering I need, and will 50GB cover both devices? |
A useful rule: compare the amount you will genuinely use, not just pounds per gigabyte. A 100GB tariff is not better value for you merely because its price per GB is lower; equally, an affordable 60GB rolling tariff could beat a more restrictive 50GB contract on both capacity and flexibility.
Dated example — 19 October 2026, DealPriceCheck’s checked catalogue. Its Lyca Mobile 50GB rolling offer showed £7.50 for the first month, then £15 per month. Its iD Mobile 50GB 12-month offer showed £8 per month for 12 months, with no annual price rise indicated. The two use different underlying networks and have different terms, so this is a cost illustration, not a recommendation to choose one over the other. Prices and availability may have changed since the check.
If those published rates were to remain unchanged throughout the comparison periods, the maths would be:
| Time used | Lyca introductory example | iD 12-month example |
|---|---|---|
| First month | £7.50 | £8.00 |
| First three months | £37.50 | £24.00 in payments, but still subject to the 12-month commitment |
| First 12 months | £172.50 | £96.00 total 12-month commitment |
The Lyca 12-month figure is an illustrative continuation of a cancellable monthly plan, not a contractual promise that its monthly rate will remain unchanged. The iD figure represents its stated fixed-period commitment in that dated listing. Neither calculation accounts for possible extras, eligibility differences or changes to either offer. A promotion can be the cheapest option for one month but poor value if you keep paying the renewal rate without noticing.
To compare any two offers yourself, use:
Cost over your intended stay = discounted-month payments + subsequent regular-month payments + relevant upfront charges.
If one offer includes cashback or a gift card, keep the bill total separate from the value of the incentive. A voucher is only worth its headline value if you receive it, meet the conditions and would actually use it. This matters because UK comparison services sometimes display a reward-adjusted equivalent price while your direct debit is higher.
An even more revealing dated example (19 October 2026): DealPriceCheck and iD Mobile’s official SIM-only listing both showed 50GB at £8 per month on 12-month and 24-month terms. The displayed minimum commitments were £96 versus £192 respectively. The 24-month deal did not offer a cheaper monthly rate in that snapshot.
That does not mean a 24-month contract is always wrong. A longer period at a guaranteed price can itself be valuable if the provider's terms genuinely protect that price for the full commitment and you expect to stay. But at the same £8 monthly rate, the longer contract did not save money in this snapshot. Weigh any verified benefit against having another year in which you may have to pay to leave. Read the early-exit, upgrade and price-change conditions before choosing.
Want the option to change networks quickly? Compare the rolling 50GB cards with the wider no-contract SIM-only deals selection. A 30-day rolling plan offers flexibility, not necessarily a permanent price guarantee.
This is where an exact-allowance comparison can mislead shoppers. 50GB is a useful search filter, not a reason to reject a larger bundle that costs the same or less. The cards on this page intentionally show exact-50GB plans; larger alternatives belong in the full SIM-only comparison.
For a concrete cross-check, on 19 October 2026 DealPriceCheck’s broader catalogue showed a Talkmobile 60GB, 30-day rolling plan at £7.95/month, alongside an iD Mobile 50GB, 12-month plan at £8/month. In that snapshot the larger Talkmobile allowance also had the shorter stated commitment. But these were not interchangeable: the cards reported different underlying network arrangements and EU roaming limits — 5GB for the Talkmobile listing versus 30GB for the iD listing. Prices and conditions can change.
That is precisely why the final decision should use this sequence:
If your typical usage is well below 50GB, see the existing 30GB SIM deals and 20GB SIM deals. If you routinely use far more than 50GB, compare higher-data plans or unlimited SIM deals. “Unlimited” still needs a check for fair use, speed restrictions, tethering and roaming.
Usually yes for ordinary phone use plus some video and occasional tethering — but not automatically for a laptop replacing home broadband. Your 50GB is for the plan’s allowance period, which may be a calendar month or 30 days. The four-week estimate above is only a way to visualise it, not a separate weekly allowance.
The biggest swing factor is video quality. According to Netflix’s own data-use guidance, its high-quality HD playback can use up to 3GB per hour, while its medium setting can use up to 0.7GB per hour. These are Netflix settings, not universal rates for YouTube, TikTok, video calls or all mobile apps.
Here is a practical stress test, using Netflix’s up-to rates and an illustrative four-week period:
| Streaming habit outside Wi-Fi | Illustrative usage | What it means for 50GB |
|---|---|---|
| Two hours of Netflix HD per week | Up to 24GB in four weeks | Leaves room for other uses, but not an enormous buffer |
| Four hours of Netflix HD per week | Up to 48GB in four weeks | Nearly the entire 50GB before maps, social apps or updates |
| Four hours per week on Netflix’s medium setting | Up to 11.2GB in four weeks | Much more headroom for other mobile data |
Actual usage may be lower, and the device’s mobile settings can differ from playback settings on a computer or TV. The table is a scenario, not a prediction of your bill. On a hotspot, laptop software updates, cloud backups and video calls can add data without an obvious phone notification. Even where tethering is permitted, the number of connected devices can make 50GB disappear faster than expected.
Check what happens after 50GB runs out. Some providers sell another data bundle; others can charge out of an existing credit balance. For example, 1pMobile's 50GB Boost details, checked on 19 October 2026, described excess data being charged against account credit. Its published UK tariff states 1p per MB — so 500MB beyond the bundle would cost £5 at that rate. Its top-up help explains that an optional automatic top-up can add credit when the balance falls below £2. Check the tariff and your account settings before heavy tethering: the balance could be replenished and spending could continue. This example is specific to 1pMobile, not every 50GB SIM. You can review its current offer through the View Deal button above.
Before signing up, open your existing provider’s app and inspect at least two or three recent complete billing periods, preferably including a week away from Wi-Fi. If you are consistently using 35–45GB and expect more streaming or hotspot use, a bigger allowance may be safer. If you regularly finish with more than half your data unused, a cheaper smaller plan could be the smarter buy. For a broader estimation method, use our mobile data usage calculator or guide to choosing a data allowance.
UK data and overseas data are different entitlements. Providers can include a smaller EU allowance, restrict eligible countries or apply long-stay rules. For example, these rules were independently checked against official provider pages on 19 October 2026:
| Provider with 50GB listings in our catalogue | Included roaming-data ceiling described by the provider | Official evidence |
|---|---|---|
| iD Mobile | Up to 30GB in eligible Roam Free destinations on new contracts, subject to the plan's rules | iD fair-use policy and 2 October 2026 staff clarification |
| O2 | Up to 25GB in its Europe Zone when the UK allowance exceeds 25GB | O2 EU roaming |
| 1pMobile | Up to 14GB EU roaming with its 50GB Boost | 1pMobile roaming terms |
| Lyca Mobile | 12GB EU and India roaming allowance on the referenced 50GB plan | Lyca's 50GB roaming comparison |
| giffgaff | 5GB per plan in the EU and selected destinations, subject to eligibility | giffgaff roaming help |
These are not a ranking of all available 50GB plans or a promise that every tariff from a given brand receives identical benefits. Destination lists, customer eligibility and policies can differ. In particular, giffgaff warns that a new customer without established UK usage might not qualify for included roaming immediately; its 5GB ceiling is per plan, not 5GB for each country visited.
Important iD clarification: its fair-use page still displays an older notice suggesting the usual 30GB ceiling was temporarily removed. However, an iD Mobile employee confirmed on 2 October 2026 that the temporary promotion had ended and new contracts should expect a 30GB roaming cap. Some older customers have different entitlements. Because the official pages have conflicting wording, check your own account's allowance with iD before travel.
Always check the exact tariff terms and destination before travelling. You can compare the available 50GB offers using the live cards above.
For holidays, do not pay for a pricier UK allowance just because you assume you can use all of it in Europe. Filter the cards and compare the dedicated SIM deals with EU roaming page if travelling is your main need. Some tariffs may have roaming that is not stated on the card; an absent roaming badge is not proof that roaming is unavailable.
DealPriceCheck’s 50GB selection currently spans providers with different underlying network arrangements. A smaller provider can be worth considering if it reaches the places you use most and has the features you need; a familiar network name is not automatically worth a premium, and a cheaper plan is not good value with unusable reception.
Check the actual coverage at home, indoors, at work and along your commute. Ofcom’s Map Your Mobile lets you check network coverage and performance using a postcode. Coverage predictions are a useful starting point, not a guarantee of signal inside one particular building. If possible, test the chosen network on a rolling plan before committing for a year or two.
Then check whether the features you actually need are included:
You want the cheapest sensible long-term cost. Ignore the first-month headline until you have checked the normal price. Use the deal’s full details to compare 12-month total commitment with an equivalent period on a rolling plan. Do not accept a 24-month term simply because it sounds like better value; verify the actual saving.
You want 50GB without being tied down. Start by filtering for 30-day rolling plans, including eligible 50GB offers from providers such as 1pMobile, Lebara, Lyca or giffgaff where their current cards match your needs. Compare renewals and any fair-use or cancellation conditions. A rolling term can be useful for testing a new signal, moving house or adjusting your usage.
You specifically want EE-network access. The live 50GB selection includes EE-network options such as 1pMobile and Lyca. Compare their coverage-related features, included minutes, renewal prices, eSIM eligibility and roaming rather than assuming both behave exactly like an EE-branded plan. You can also browse EE-network SIM deals.
You travel within Europe frequently. Start with the actual roaming ceiling and destinations rather than the UK data figure. For instance, a lower-priced 50GB plan with a small roaming allowance may be poor value for a long trip. The extra cost of overseas data could dwarf a saving on the UK monthly bill.
Run through this final check: 50GB UK allowance; coverage at your postcode; promotional end date and renewal price; commitment; roaming destination and limit; eSIM and device compatibility; upfront and out-of-bundle charges. If the provider’s checkout differs from the card, rely on its current terms. A cached promotional rate may no longer be available.
For many people who browse, use social media, listen to music, navigate and stream some video outside Wi-Fi, 50GB can be sufficient. It may not be enough for heavy HD streaming, frequent hotspot use or replacing home broadband. The most reliable guide is your own usage across recent billing periods, not someone else’s average.
Using Netflix’s published up-to consumption rates, 50GB could cover around 16 hours of HD playback at 3GB per hour, or around 71 hours on its medium setting at 0.7GB per hour — only if no other activity uses mobile data. Actual data consumption varies with the device and settings. These are not estimates for every streaming service.
Yes, when an eligible rolling 50GB offer appears in the live selection. Use the contract-length filter above. A rolling plan normally gives you more freedom to leave after the applicable notice period than a longer minimum term, but the rate can still change under the provider’s conditions.
There is no permanent cheapest provider. Prices, short-term discounts, cashback eligibility and availability change, and this page covers a selected, not whole-of-market list of exact-50GB offers. Compare the live cards for the lowest suitable offer here; also check other data sizes in the full SIM-only catalogue before paying. A deal labelled “cheap” can cost more after its introductory month.
Not necessarily. UK and EU limits differ. For example, official rules for iD Mobile, 1pMobile, O2, Lyca and giffgaff show included roaming caps below 50GB for relevant tariffs. Check your specific destination, customer eligibility, allowance and any excess-data charges.
Yes. If you are changing UK providers and want to keep your number, text PAC to 65075 from your existing number, then give the code to your new provider. Ofcom says the code is valid for 30 days. Check for early-exit charges on an existing fixed-term contract before switching. See Ofcom’s official switching guide.
Tariff price examples above are dated 19 October 2026. Live plan prices, promotions and availability can change; always confirm the current offer with the provider.