Unlimited Data SIM Plans

Always need a little more mobile data? Never run out again with an unlimited data SIM only deal!

Most mobile networks now offer fantastic deals on unlimited data SIM plans to accomodate customers that burn through their data every month, some with great perks like reduced monthly contracts and perks like free streaming and 5G capability.

three logo
Three
Unlimited Data
24 Month Contract
£20.00 / month
Unlimited Minutes
Unlimited Texts
Exclusive Price
Great Low-Cost Unlimited Data
More Info
Check Three coverage
where you live

No Data Caps Or Throttling

5G Ready

Switch to Three and get £100 cashback

  • Connect other devices to your phone hotspot and use your data allowance to get online
  • Access exclusive offers and treats - Only for Three customers
three logo
Three
Unlimited Data
12 Month Contract
£18.00 / month
Unlimited Minutes
Unlimited Texts
Great Low-Cost Unlimited Data
5G Ready Data
More Info
Check Three coverage
where you live

No Data Caps Or Throttling

5G Ready

Use popular apps without using your data.

  • Connect other devices to your phone hotspot and use your data allowance to get online
  • Access exclusive offers and treats - Only for Three customers
three logo
Three
Unlimited Data
1 Month SIM
£31.00 / month
Unlimited Minutes
Unlimited Texts
Cheap & Flexible Unlimited Data
Change Your Contract Anytime
More Info
Check Three coverage
where you live

No Data Caps Or Throttling

Rolling Contract

  • Flexible 1 month plan - You can choose to cancel after one month or carry on using it.
smarty logo
Smarty
Unlimited Data
1 Month SIM
£20.00 / month
Unlimited Minutes
Unlimited Texts
No Credit Check
No Contract
More Info
Check Smarty coverage
where you live

Keep your price low for life

Rolling Contract

No Credit Check Required

vodafone logo
ID Mobile
Unlimited Data
24 Month Contract
£16.00 / month
Unlimited Minutes
Unlimited Texts
Half Price - £8 first 6mo
More Info
Check ID Mobile coverage
where you live

UK's Fastest 5G Network

No Annual Price Rises

99% Network Coverage

  • 3-month free trial of Vodafone Secure Net
  • Upgrade with "Xtra" benefits - add roaming, device care and other perks
vodafone logo
Vodafone
Unlimited Data
24 Month Contract
£36.00 / month
Unlimited Minutes
Unlimited Texts
Unlimited Max - Fastest Posible Speeds
More Info
Check Vodafone coverage
where you live

Fastest Available Data Speeds

5G Ready Contract

3 Mo Free Security

  • Enjoy weekly offers, discounts and giveaways with VeryMe Rewards
  • 3-month free trial of Vodafone Secure Net
  • Upgrade with "Xtra" benefits - add roaming, device care and other perks
vodafone logo
Vodafone
Unlimited Data
12 Month Contract
£38.00 / month
Unlimited Minutes
Unlimited Texts
Unlimited Max - Fastest Posible Speeds
More Info
Check Vodafone coverage
where you live

Fastest Available Data Speeds

5G Ready Contract

3 Mo Free Security

  • Enjoy weekly offers, discounts and giveaways with VeryMe Rewards
  • 3-month free trial of Vodafone Secure Net
  • Upgrade with "Xtra" benefits - add roaming, device care and other perks
vodafone logo
Vodafone
Unlimited Data
24 Month Contract
£33.00 / month
Unlimited Minutes
Unlimited Texts
Unlimited Plus - Maximum 100Mbps download speeds
More Info
Check Vodafone coverage
where you live

Downloads capped at 100Mbps

5G Ready Contract

3 Mo Free Security

  • Enjoy weekly offers, discounts and giveaways with VeryMe Rewards
  • 3-month free trial of Vodafone Secure Net
  • Upgrade with "Xtra" benefits - add roaming, device care and other perks
vodafone logo
Vodafone
Unlimited Data
24 Month Contract
£30.00 / month
Unlimited Minutes
Unlimited Texts
Maximum 10Mbps download speeds
More Info
Check Vodafone coverage
where you live

Downloads capped at 10Mbps

5G Ready Contract

3 Mo Free Security

  • Enjoy weekly offers, discounts and giveaways with VeryMe Rewards
  • 3-month free trial of Vodafone Secure Net
  • Upgrade with "Xtra" benefits - add roaming, device care and other perks

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What is an Unlimited Data SIM Only Deal?

An Unlimited data SIM Only contract is a deal that allows you to use a theoretically unlimited amount of data each month (this could be a 1-month SIM or longer contract). This data could be used simply for browsing or for more intensive tasks like streaming video or performing work on the go.

However, it's important to look closely at your potential SIM only deal when you compare Unlimited plans since they're not all created equal - we'll go into this a bit further down.

Which Networks Provide Unlimited Data SIM Plans?

Three - Three have offered customers unlimited data SIM deals for a while and are one of the few networks which offer fully unlimited data with no caps or throttling involved.

We're big fans of the unlimited data SIMs offered by Three because they have a great balance of coverage, 5G speeds and value for money.

Three do monitor for usage over 1000GB per month but this would only be hit if a SIM was being used in an improper way and is extremely unlikely for a normal customer. Three offer unlimited data SIM contracts with 1-month, 12-month or 24-month lengths.

Vodafone - Vodafone also have a good range of unlimited data sim plans available. However, they are also very tricky to compare due to a number of factors.

Vodafone split their unlimited data packages up by the download speeds avaialable. In simple terms, if you want faster speeds you need to pick their "Max" SIM contract.

They provide 3 "tiers" of plan however which is based on the speeds the customer can use their unlimited allowance.

a) Unlimited: Maximum download speeds of 10mbps.
b) Unlimited Plus: Maximum download speeds of 100mbps.
c) Unlimited Max: the fastest speed available.

Whilst the price differences aren't huge, the contracts are pricier than other networks. Vodafone do have additional perks like roaming packages and entertainment deals available on certain SIMS.

We've picked out a few of their curent unlimited SIMs above but for more info, check out the Vodafone website.

Smarty - Smarty's Unlimited data plan is run by Three. The plan is essentially the same as Three but at a lower 1-month cost. This allowas you to flexibly move between Smarty plans each month if you choose to.

Virgin Mobile - Unfortunately, Virgin's unlimited plan is only available to customers with Virgin TV or Broadband. Despite this, the cost of their unlimited data allowance is much more than the others.

Who Are Unlimited Data Plans For?

It used to be the case that most of us could get by on 1-2GB of data per month due to the low amounts of data being used every day. Now with more and more of our lives taking place online and more importantly over our phones, the amount of data we use is going up.

Streaming platforms, constant social media feeds, higher-res images and videos are all eating up our data every month and it doesn't show any signs of slowing down. Unlimited data SIM plans do away with the worry of running out of data every month and can even help by providing a wifi hotspot for when you're out and about - Some people even replace their home wifi where a great mobile signal is available.

If you're always juggling your data allowance then an unlimited sim is an affordable way of getting the most from your mobile and giving you the flexibility of putting your SIM into any new phone you get.

Which Unlimited SIM Plan Is Best?

We've already outlined how the various Unlimited plans are different for each network and you can browse the offers above to find one that suits your budget...

...but without a doubt the best combination of affordability and practicality is Three Mobile's Unlimited 24-month SIM plan.

Their current offer of 6 months at £10p/m is too good to miss out on at the moment and because they offer truly unlimited data (no caps, no throttling unlike others), it's the perfect solution if you want a contract you can buy once and never worry about again. (you can even get a 12-month and 1-month version).

Is your data really "Unlimited"?
If you're looking for a SIM plan with Unlimited data it's important to know what you're getting.

Many "unlimited" SIM plans currently have limits on the speeds which you can use your data - For example giffgaff limit your speed once you reach a certain data cap and Vodafone have large variations in the speeds which certain plans can reach (2mbps for their £22 Unlimited Lite plan). Knowing what you need unlimited data for means you can make the right decision.

If you're looking for an Unlimited Data SIM, let's get started!