Cable.co.uk may earn a commission when you purchase via links on our site. The price you pay will always be equal to or often cheaper than the price you would pay by going direct to the provider.
Best deals
Filter
Sort by
Filter resultsDone
Phones with SIMSIM free phonesSIM onlyData SIMs
Data speed
Any5G
Network
3BTEEgiffgaffiDO2PlusnetSkySmartyTescoVirgin MobileVodafoneVoxi
Monthly cost
£0-£10£10-£30£30-£50£50-£80£80+
Minutes
500+1000+5000+Unlimited
Data
1GB+2GB+5GB+10GB+50GB+Unlimited
Contract length
PAYG11-1212+
Gifts & extras
CashbackGift VoucherFree Gift
Advanced SIM Only Unlimited DataUnltddataUnltdminutesUnltdtexts12month contractZeroupfront cost£16.00per monthGet DealThree
Smarty UnlimitedUnltddataUnltdminutesUnltdtexts1month contractZeroupfront cost£16.00per monthGet DealSmarty
5G SIM Only UnlimitedFree EU RoamingUnltddataUnltdminutesUnltdtexts12month contractZeroupfront cost£16.00per monthGet DealiD Mobile
Pay MonthlyUnltddataUnltdminutesUnltdtexts24month contractZeroupfront cost£17.50per monthGet DealTesco Mobile
Unlimited SIM Only LiteUnltddataUnltdminutesUnltdtexts24month contractZeroupfront cost£23.00per monthGet DealVodafone
SIM Only UnlimitedFree EU RoamingUnltddataUnltdminutesUnltdtexts24month contractZeroupfront cost£25.00per monthGet DealVirgin Mobile
Unlimited SIM Only Max + 4 Xtra BenefitsUnltddataUnltdminutesUnltdtexts12month contractZeroupfront cost£38.00per monthGet DealVodafone
5G SIM Plan 24m UnlimitedUnltddataUnltdminutesUnltdtexts24month contractZeroupfront cost£35.00per monthGet DealEE
Advanced SIM Only Unlimited DataUnltddataUnltdminutesUnltdtexts1month contractZeroupfront cost£24.00per monthGet DealThree
Unlimited SIM Only LiteUnltddataUnltdminutesUnltdtexts12month contractZeroupfront cost£25.00per monthGet DealVodafone
SIM Only Plus UnlimitedO2 TravelUnltddataUnltdminutesUnltdtexts24month contractZeroupfront cost£32.00per monthGet DealO2
5G SIM Plan 12m UnlimitedUnltddataUnltdminutesUnltdtexts12month contractZeroupfront cost£37.00per monthGet DealEE
5G SIM Only UnlimitedFree EU RoamingUnltddataUnltdminutesUnltdtexts24month contractZeroupfront cost£16.00per monthGet DealiD Mobile
Advanced SIM Only Unlimited DataUnltddataUnltdminutesUnltdtexts12month contractZeroupfront cost£22.00per monthGet DealThree
SIM Only Endless Data£20 Amazon.co.uk VoucherUnltddataUnltdminutesUnltdtextsNo contractZeroupfront cost£35.00per monthGet DealVoxi
Show me more deals
{"comparison-market":"enhanced-telco","config-name":"generic","numberOfDealsToDisplay":15,"sort":"most_popular","always-set-filters":{"deal-type-section":["New Consumer"],"reseller-section":["exclude-all"]},"exclude-filters":[],"filter-section-order":[],"excluded-filter-sections":[],"page-attributes":[],"filter-sections":[{"id":"product-type-section","filter_group":[{"id":"product-type-group-1","mutex":true,"filter":[{"id":"phone-with-sim","label":"Phones with SIM","sets_attribute":["handset","sim"],"selected":false},{"id":"phone-sim-free","label":"SIM free phones","sets_attribute":["handset"],"selected":false},{"id":"sim-only","label":"SIM only","sets_attribute":["sim"],"selected":true},{"id":"data-sim","label":"Data SIMs","sets_attribute":["data-sim"],"selected":false}],"default_id":"phone-with-sim","disallow_manual_deselect":true}],"section_heading":""},{"id":"data-standard-section","filter_group":[{"id":"product-type-group-1","mutex":true,"filter":[{"id":"any","label":"Any"},{"id":"5g","label":"5G"}],"default_id":"any","disallow_manual_deselect":true}],"section_heading":"Data speed"},{"id":"network-section","filter_group":[{"id":"network-group-1","filter":[{"id":"Three","label":"3"},{"id":"BT","label":"BT"},{"id":"EE","label":"EE"},{"id":"giffgaff","label":"giffgaff"},{"id":"iD","label":"iD"},{"id":"O2","label":"O2"},{"id":"Plusnet","label":"Plusnet"},{"id":"Sky Mobile","label":"Sky"},{"id":"Smarty","label":"Smarty"},{"id":"Tesco Mobile","label":"Tesco"},{"id":"Virgin Mobile","label":"Virgin Mobile"},{"id":"Vodafone","label":"Vodafone"},{"id":"Voxi","label":"Voxi"}]}],"is_attribute_of":["sim","data-sim"],"section_heading":"Network"},{"id":"monthly-cost-section","filter_group":[{"id":"monthly-cost-group-1","mutex":true,"filter":[{"id":"10","label":"u00a30-u00a310"},{"id":"30","label":"u00a310-u00a330"},{"id":"50","label":"u00a330-u00a350"},{"id":"80","label":"u00a350-u00a380"},{"id":"over80","label":"u00a380+"}]}],"is_attribute_of":["sim","data-sim"],"section_heading":"Monthly cost"},{"id":"talk-time-section","filter_group":[{"id":"talk-time-group-1","mutex":true,"filter":[{"id":"500","label":"500+"},{"id":"1000","label":"1000+"},{"id":"5000","label":"5000+"},{"id":"UNLIMITED","label":"Unlimited"}]}],"is_attribute_of":["sim"],"section_heading":"Minutes"},{"id":"data-section","filter_group":[{"id":"data-group-1","mutex":true,"filter":[{"id":"1000","label":"1GB+","selected":false},{"id":"2000","label":"2GB+","selected":false},{"id":"5000","label":"5GB+","selected":false},{"id":"10000","label":"10GB+","selected":false},{"id":"50000","label":"50GB+","selected":false},{"id":"UNLIMITED","label":"Unlimited","selected":true}]}],"is_attribute_of":["sim","data-sim"],"section_heading":"Data"},{"id":"contract-length-section","filter_group":[{"id":"contract-length-group-1","filter":[{"id":"payg","label":"PAYG"},{"id":"1","label":"1"},{"id":"12","label":"1-12"},{"id":"over12","label":"12+"}]}],"is_attribute_of":["sim","data-sim"],"section_heading":"Contract length"},{"id":"gift-section","filter_group":[{"id":"gift-group-1","filter":[{"id":"Cashback","label":"Cashback"},{"id":"Gift Voucher","label":"Gift Voucher"},{"id":"Free Gift","label":"Free Gift"}]}],"section_heading":"Gifts & extras"}],"hide-filter-pane":false}

Why choose a SIM with unlimited data?

Here's the thing. Most of us spend most of our time within range of a wifi signal. In fact, I think many would be shocked just how little mobile data they use, so long as they have logged into wifi at home, work and at the houses of friends and family.

However, there are some either with specific job types that see them out and about more than at home, or they just like to fill their time with video streaming when commuting. So, here are the three reasons you might want to pick an unlimited data mobile SIM over any other type.

  • You stream a lot – If you watch a lot of streamed video content on YouTube, Netflix or other, and you tend to do that while you're out and about, then there is potentially a need for either a very large data limit, or more economically, an unlimited data SIM only plan
  • You download a lot of apps and games – Equally, apps and games can be pretty huge these days, so if you're a keen mobile gamer and like to try a lot of different apps and games each month, there's potentially an argument to choose an unlimited data SIM deal over any other type of plan
  • You just don't want to think about data – Here's the reason most of us here at Cable.co.uk have unlimited data SIMs in our phones: It's not that expensive and you can just forget about data limits altogether. At the time of writing, we've seen unlimited data SIMs for as little as £11 per month, and there are a lot of limited SIMs out there that cost more than that. Unlimited data is set to become the rule rather than the exception

Frequently asked questions

Can I get an a SIM with unlimited data?

Yes. A wide range of providers now offer SIMs with unlimited data. Where a year or two ago it was just one or two. For the full list of providers, see the section above this one.

Are unlimited SIMs more expensive?

Yes and no. They are generally the most expensive SIM from most providers. However, they are often cheaper than very-large-limit SIMs were just a year or two ago. So it's a matter of perspective.

What SIM card do I need?

It’ll be one of three sizes of SIM cards that you need – standard, micro or nano. Deals come with either a multi-SIM that includes all three.

How much data do I need?

Probably less than you think. Though unlimited data SIMs are set to become the norm, most of us spend the majority of our time within range of a wifi signal. Ultimately, the only way to know is to check how much data you use month to month.

Who has the cheapest unlimited data plan?

This changes day to day, but it's easy to find out using the tools on this very page. Simply select all providers and sort the deals by monthly cost. The cheapest deal will be the first listed.