Unlimited data SIM only deals

Use our SIM only search to find the cheapest Unlimited data SIM only deals on the market

  • Compare Unlimited data SIM only deals, updated hourly.
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Compare Unlimited data SIM only deals

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Cost Details
Networks
  • ALL
  • 1pMobile
  • Asda Mobile
  • Giffgaff
  • Honest Mobile
  • iD Mobile
  • Lebara
  • Lycamobile
  • Sky Mobile
  • O2
  • Smarty
  • Spusu
  • Talkmobile
  • Three
  • Vodafone
  • Voxi
SIM Type
Smarty SIM Card 5G
Smarty SIM
1 month contract
Unlimited
Minutes
Unlimited
Texts

Unlimited Data
You pay
£15.00
per month
Powered By: Three Free EU roaming
EXCLUSIVE DEAL
Talkmobile SIM Card 5G
Talkmobile SIM
1 month contract
Unlimited
Minutes
Unlimited
Texts

Unlimited Data
You pay
£16.00
per month
Powered By: Vodafone Free EU Roaming
iD Mobile SIM Card 5G
iD Mobile SIM or eSIM
1 month contract
Unlimited
Minutes
Unlimited
Texts

Unlimited Data
You pay
£16.00
per month
Powered By: Three Free EU roaming
Choose a retailer
    iD Mobile SIM Card 5G
    iD Mobile SIM or eSIM
    24 month contract
    Unlimited
    Minutes
    Unlimited
    Texts

    Unlimited Data
    You pay
    £16.00
    per month

    £120.00 Cashback by Redemption
    Powered By: Three Free EU roaming
    iD Mobile SIM Card 5G
    iD Mobile SIM or eSIM
    24 month contract
    Unlimited
    Minutes
    Unlimited
    Texts

    Unlimited Data
    You pay
    £16.00
    per month
    Powered By: Three Free EU roaming
    Three SIM Card 5G
    Three SIM
    12 month contract
    Unlimited
    Minutes
    Unlimited
    Texts

    Unlimited Data
    You pay
    £17.00
    per month

    £96.00 Cashback by Redemption
    Monthly price + out of bundle charges will increase each April by the CPI rate (announced in December) + 3.9%
    iD Mobile SIM Card 5G
    iD Mobile SIM or eSIM
    12 month contract
    Unlimited
    Minutes
    Unlimited
    Texts

    Unlimited Data
    You pay
    £17.00
    per month

    £72.00 Cashback by Redemption
    Powered By: Three Free EU roaming
    Three SIM Card 5G
    Three SIM
    12 month contract
    Unlimited
    Minutes
    Unlimited
    Texts

    Unlimited Data
    You pay
    £17.00
    per month

    £55.00 Auto Cashback
    Monthly price + out of bundle charges will increase each April by the CPI rate (announced in December) + 3.9%
    iD Mobile SIM Card 5G
    iD Mobile SIM or eSIM
    12 month contract
    Unlimited
    Minutes
    Unlimited
    Texts

    Unlimited Data
    You pay
    £17.00
    per month
    Powered By: Three Free EU roaming
    Three SIM Card 5G
    Three SIM
    12 month contract
    Unlimited
    Minutes
    Unlimited
    Texts

    Unlimited Data
    You pay
    £17.00
    per month
    Monthly price + out of bundle charges will increase each April by the CPI rate (announced in December) + 3.9%
    iD Mobile SIM Card 5G
    iD Mobile SIM or eSIM
    1 month contract
    Unlimited
    Minutes
    Unlimited
    Texts

    Unlimited Data
    You pay
    £18.00
    per month
    Powered By: Three Free EU roaming
    Asda Mobile SIM Card 5G
    Asda Mobile SIM
    1 month contract
    Unlimited
    Minutes
    Unlimited
    Texts

    Unlimited Data
    You pay
    £20.00
    per month
    Powered By: Vodafone Up to 2 Mbps Free EU roaming
    EXCLUSIVE DEAL
    Three SIM Card 5G
    Three SIM or eSIM
    24 month contract
    Unlimited
    Minutes
    Unlimited
    Texts

    Unlimited Data
    You pay
    £20.00
    per month
    Monthly price + out of bundle charges will increase each April by the CPI rate (announced in December) + 3.9%
    EXCLUSIVE DEAL
    Three SIM Card 5G
    Three SIM or eSIM
    12 month contract
    Unlimited
    Minutes
    Unlimited
    Texts

    Unlimited Data
    You pay
    £21.00
    per month
    Monthly price + out of bundle charges will increase each April by the CPI rate (announced in December) + 3.9%
    Asda Mobile SIM Card 5G
    Asda Mobile SIM
    1 month contract
    Unlimited
    Minutes
    Unlimited
    Texts

    Unlimited Data
    You pay
    £22.00
    per month
    Powered By: Vodafone Up to 10 Mbps Free EU roaming
    Honest Mobile SIM Card 5G
    Honest Mobile SIM
    12 month contract
    Unlimited
    Minutes
    Unlimited
    Texts

    Unlimited Data
    You pay
    £22.50
    per month
    Powered By: Three Free EU Roaming Loyalty Discounts
    Lebara SIM Card 5G
    Lebara SIM
    12 month contract
    Unlimited
    Minutes
    Unlimited
    Texts

    Unlimited Data
    You pay
    £22.50
    per month
    Powered By: Vodafone Free EU roaming 100 International minutes
    Asda Mobile SIM Card 5G
    Asda Mobile SIM
    1 month contract
    Unlimited
    Minutes
    Unlimited
    Texts

    Unlimited Data
    You pay
    £24.00
    per month
    Powered By: Vodafone Free EU roaming
    EXCLUSIVE DEAL
    Lycamobile SIM Card 5G
    Lycamobile SIM or eSIM
    1 month contract
    Unlimited
    Minutes
    Unlimited
    Texts

    Unlimited Data
    You pay
    £25.00
    per month

    6 Months at £9.99
    Powered By: EE
    Lebara SIM Card 5G
    Lebara SIM
    1 month contract
    Unlimited
    Minutes
    Unlimited
    Texts

    Unlimited Data
    You pay
    £25.00
    per month
    Powered By: Vodafone Free EU roaming 100 International minutes
    Can't find what you are looking for?
    Deals last updated: 1 hour 7 minutes ago
    • All stated cost assume that you pay monthly via direct debit, uless otherwise state by them. Networks that require payment via direct debit may charge you a higher montly cost if you do not pay via direct debit.

    Find the best Unlimited data SIM only deal for you

    SIM Only Finder compares unlimited data sim only deals and tariffs from all the UK’s leading mobile networks and MVNOs. These include Three, O2, Vodafone, iD Mobile, Smarty, VOXI, 1pMobile, Lebara Mobile, Lycamobile, Asda Mobile and Spusu.

    What is an unlimited data SIM?

    As the name suggests an unlimited data sim only deals gives you access to unlimited data for to use how you wish.

    If you like to stream video on the go, using services such as Netflix or YouTube, or like to listen to a lot of music on the move then an unlimited data sim only deal might be a good option for you.

    An unlimited sim only deal is great as you can be sure that you will not get a huge bill for overusing your data allowance.

    Some networks will also allow you to use a portion of this data when roaming abroad, although most cap this at 25Gb per month, which is still plenty!

     

    Will I be able to tether to a laptop or tablet with an unlimited data SIM only?

    To put it bluntly, yes. Yes you will be able to use your Unlimited data SIM to tether to your laptop or tablet.

    There used to be heavy restrictions and extra costs in order to tether and some networks did not allow you to do this at all. All these restrictions have now been removed and you are free to tether as you need.

    Just keep in mind any fair usage policies your network might have in place, which we have detailed above.

    Do unlimited data SIM deals have fair usage policies?

    Some networks do have fair usage policies in place in order to prevent abuse, where networks do have fair limits in place, this are very large and will allow for a huge amount of data usage. Some networks choose to limit your speed after you have used too much data.

    1pMobile unlimited data fair usage policy

    1pMobile do not offer an unlimited data tariff.

    Asda Mobile unlimited data fair usage policy

    Asda Mobile do not have a fair usage policy in place, however their website does state that SIM only deals can only be used for personal use and not for business or commerical purposes.

    Although they do not have restrictions on the amount of data you can use, some tariffs include speed limits from the beginning, these are clearly labelled in our comparison engine above.

    Giffgaff unlimited data fair usage policy

    Giffgaff state that if you exceed 650GB/month twice in 6 months then this could lead to speed restrictions or charge per MB.

    Honest Mobile unlimited data fair usage policy

    Honest Mobile enforce 3G data speeds if your usage exceeds 650 GB in a monthly billing cycle.

    Lebara Mobile unlimited data fair usage policy

    Lebara mobile do not have a fair usage policy in place, as long as you are using it for personal use and are within the UK. There also place no speed restrictions based on amount of data used.

    Lycamobile unlimited data fair usage policy

    Lycamobile state that using over 450 GB of data twice within a 6 month period is a breach of their Fair Usage policy. If they believe you are in breach then they may investigate your usage further to ascertain whether your unlimited data usage is in line with their Fair Usage Policy and take action.

    iD Mobile unlimited data fair usage policy

    iD Mobile do not currently have a fair usage policy in place, neither to they limit your data speeds based on usage.

    They do however state that their SIM only deals can only be used for personal use and not to be used for business or commercial purposes.

    O2 unlimited data fair usage policy

    O2 do have a fair usage policy in place for unlimited data plans.

    Your usage may be investigate if you do any of the following; reguarly tether to 12 or more devices, Use 650Gb of data twice within a 6 month period or have connected to a device that is not eligible as state in the clase of your contact.

    If O2 feel you exceed their deginiation of fair uage they may transfer you to a plan with data restrictions.

    Spusu unlimited data fair usage policy

    Spusu do not have a fair usage policy in place, you are free to consume as much data as required as long as its for personal use and you are in the UK.

    Talkmobile unlimited data fair usage policy

    Talkmobile do not currently have a fair usage policy in place, neither to they limit your data speeds based on usage.

    Three unlimited data fair usage policy

    Three mobile do not have a fair usage policy in place, nor do they restrict your speed based on usage.

    As long as you use the SIM only deal for personal use within the UK and not using it for business or personal you can use your as much data as you need.

    Vodafone unlimited data fair usage policy

    Vodafone offer three different unlimited data SIM only tariffs. These are Unlimited Lite, Unlimited and Unlimited Max.

    Unlimited Lite although offers unlimited data has a speed restriction of 2 Mbps included from the beginning. the Unlimited plan has a speed restriction of 10 Mbps whilst the Unlimited Max plan has no speed restriction.

    Vodafone do have a policy in place to limit the speed of your data if your usage is negatively affecting other customers due to your excessive usage.

    Voxi unlimited data fair usage policy

    VOXI do not have a fair usage policy in place, you are free to consume as much data as required as long as its for personal use and you are in the UK.

    You cannot use a VOXI SIM only for business or commercial use.

    Do I need unlimited data?

    Most people in the UK do not need an unlimited data SIM. Based on a recent survey in 2022 the average UK user, only uses around 11GB of data per month.

    Even if you were a heavy user of video streaming services such as Netflix or YouTube, you would be hard pushed to get near the usage of an unlimited data use.

    Whilst Unlimited data SIM only deals can be expensive, for most people they aren't a necessity, however a lot of people opt for unlimited data SIM only deals in order to have peace of mind that they will have enough they need and not need to worry about bill shock.

    SIM only Networks

    1pMobile SIM Only Deals
    Asda Mobile SIM Only Deals
    Giffgaff SIM Only Deals
    Honest Mobile SIM Only Deals
    iD Mobile SIM Only Deals
    Lebara SIM Only Deals
    Lycamobile SIM Only Deals
    O2 SIM Only Deals
    Sky Mobile SIM Only Deals
    Smarty SIM Only Deals
    Spusu SIM Only Deals
    Talkmobile SIM Only Deals
    Three SIM Only Deals
    Vodafone SIM Only Deals
    Voxi SIM Only Deals

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    Honest Mobile
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    Lycamobile
    Sky Mobile
    Reward Mobile
    mobiles.co.uk
    O2
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    Spusu
    Talkmobile
    Three
    Vodafone
    VOXI