Get unlimited data on Pay As You Go from £16/month. Compare unlimited data SIM cards with no contract & no credit check.

In the UK, most mobile networks now offer an unlimited data plan, allowing you to download as much as you like. However, the choice of mobile networks is a little more restrictive if you’re looking for unlimited data on a Pay As You Go SIM card.

If you’re looking for an unlimited data plan with no contracts and no credit checks, there are currently nine UK mobile networks offering unlimited data on Pay As You Go. Prices start from £16 per month for unlimited data on Pay As You Go.

In this article, we’ll compare the unlimited data plans that are available on Pay As You Go in the UK. We’ll start with an overview of available providers, before looking at individual mobile networks in more detail.

Unlimited Data Pay As You Go: From £16/month
Recommended Deal: £16/month on SMARTY
(5G coverage from Three & no credit check)
Alternative: £12.50/month for 3 months on Lebara using KEN3 code
(5G coverage from Vodafone, £25/month after 3 months)
With O2 Coverage:
With Three Coverage:
With Vodafone Coverage:

Unlimited Data on Pay As You Go

Compare Pay As You Go Unlimited Plans

In the UK, there are currently nine mobile networks that offer an unlimited data plan on Pay As You Go.

The following table shows a side-by-side comparison of the unlimited data plans available on each Pay As You Go network:

NetworkMinutesTextsDataMonthly Cost
SmartyUnlimitedUnlimitedUnlimited£16.00
ASDA MobileUnlimitedUnlimitedUnlimited£20.00
Lebara MobileUnlimitedUnlimitedUnlimited£25.00
LycamobileUnlimitedUnlimitedUnlimited£25.00
£15 for 3 months
VOXIUnlimitedUnlimitedUnlimited£35.00
giffgaffUnlimitedUnlimitedUnlimited£35.00

All of these plans are available on a one-month rolling basis, with no contract and no credit check required. You’ll simply pay for one month’s usage at a time and you can cancel it whenever you like.

Coverage, Speed & Limitations

When you choose an unlimited data plan on Pay As You Go, it’s important to consider the coverage you’ll get on it. You should also keep a close eye on any fair usage limits, speed restrictions and tethering limits on the plan.

The following table shows a summary of this information for each UK network:

Mobile Network Coverage Provider Speed Key Limits & Restrictions
ASDA Mobile Vodafone 5G
  • Speed restrictions apply (2Mbps, 10Mbps or 150Mbps)
giffgaff O2 5G
  • 650GB monthly fair usage
  • 12 devices tethering & hotspot
  • 80GB speed reduction (Always-On)
Lebara Mobile Vodafone 5G
Lycamobile O2 5G
  • 150GB monthly fair usage
  • No tethering & hotspot
SMARTY Three 5G
Three Three 5G
Vodafone Vodafone 5G
VOXI Vodafone 5G

For further information about the unlimited data plans on each Pay As You Go network, read on to learn more about each individual provider.

Unfortunately, it isn’t currently possible to get unlimited data on a Pay As You Go SIM card with coverage from EE. For more information, see our guide to networks using EE coverage.

Recommended Provider

At present, SMARTY is our recommended provider if you’re looking for unlimited data on Pay As You Go.

SMARTY

  • Unlimited data with no contract. Just pay for one month at a time & cancel whenever you like.
  • Get unlimited data for £16/month. Also includes unlimited minutes & unlimited texts.
  • 5G coverage & 99% 4G coverage from Three. Check SMARTY coverage here.

If you’re looking for unlimited data without a contract or credit check, SMARTY currently offers the UK’s best value deal.

If you order your unlimited data SIM card through this special link, you’ll get unlimited data for just £16 per month. This includes 5G at no extra cost, along with unlimited UK minutes & unlimited UK texts.

There are no fair usage limits or speed restrictions on SMARTY’s unlimited data plan. You can also cancel it whenever you like.

Order SMARTY Unlimited Data SIM Card →
Lebara Mobile

  • Unlimited data with no contract. Just pay for one month at a time & cancel whenever you like.
  • Get unlimited data for £12.50/month for 3 months. Then it’s £25/month.
  • 5G coverage & 99% 4G coverage from Vodafone. Find out more.

If you’re looking for unlimited data on a shorter introductory deal, Lebara Mobile offers unlimited data for just £12.50/month for the first 3 months (it’s then £25/month after the first 3 months).

To get this exclusive 3 months half price offer, you’ll need to order your SIM card through this link, entering KEN3 as your voucher code at checkout. This offer ends on the 31st November 2024.

On Lebara Mobile’s unlimited data plan, you’ll get 4G & 5G coverage from Vodafone. You’ll also get unlimited UK minutes, 100 international minutes and unlimited UK texts included with your plan.

Order Lebara Unlimited Data SIM Card →

Pay As You Go Unlimited Data: By Mobile Network

In the following section, we’ll look at the unlimited data plans on each Pay As You Go mobile network in more detail.

ASDA Mobile

On ASDA Mobile’s Pay As You Go service, there are currently three unlimited data plans you’re able to choose from. These plans start from £20/month and include 4G & 5G coverage on the Vodafone network.

  • For £20 per month, you’ll get unlimited data with download speeds of 2Mbps (equivalent to a basic 3G connection). This is enough for most daily usage like browsing the web and using messaging applications. However, HD video streaming will not work on this plan and downloads may also take a very long time.
  • For £22 per month, you’ll get unlimited data with download speeds of up to 10Mbps (equivalent to a basic 4G connection). This will allow you to stream online video in HD quality.
  • For £24 per month, you’ll get unlimited data with download speeds of up to 150Mbps. If you want to benefit from the faster download speeds available on 5G, you should choose this plan.

The following table shows ASDA Mobile’s unlimited data plans on Pay As You Go:

Network Data Monthly Cost
ASDA Mobile
  • Vodafone coverage
  • Unlimited mins
  • Unlimited texts
Unlimited
data
2Mbps max speed
£20.00
per month
1 month rolling
See deal  
ASDA Mobile
  • Vodafone coverage
  • Unlimited mins
  • Unlimited texts
Unlimited
data
10Mbps max speed
£22.00
per month
1 month rolling
See deal  
ASDA Mobile
  • Vodafone coverage
  • Unlimited mins
  • Unlimited texts
Unlimited
data
150Mbps max speed
£24.00
per month
1 month rolling
See deal  

You can use up to 5GB of data at no extra cost each month when you’re travelling abroad in 36 European destinations.

Price Fair Use Speed Limits Network

£20/month
Personal use only
2Mbps (£20 plan)
10Mbps (£22 plan)
150Mbps (£24 plan)
5G coverage
(powered by Vodafone)

For more information, see our ASDA Mobile unlimited data review.

giffgaff

On giffgaff, you can choose from two unlimited data SIM cards, both of which give you 4G & 5G coverage from O2:

  • The £25 Always On goodybag gives you unlimited data with uncapped download speeds on the first 80GB per month. After that, your download speeds will be restricted to 384kbps (around 0.4Mbps) between 8am and midnight each day.
  • The £35 golden goodybag gives you unlimited data, with full access to 5G speeds. There are no speed reductions on the £35 golden goodybag but there’s a fair usage limit of 650GB per month. In addition, giffgaff says you shouldn’t tether your phone to more than 12 devices at the same time.

The following table shows giffgaff’s unlimited data plans, both of which are available with no contract and no credit check:

Plan Data Monthly Cost
£25 SIM Only Contract
  • O2 coverage
  • Unlimited mins
  • Unlimited texts
Unlimited
data
£25.00
per month
18 month contract
See deal  
£35 Golden Goodybag
  • O2 coverage
  • Unlimited mins
  • Unlimited texts
Unlimited
data
£35.00
per month
1 month rolling
See deal  

If you’re travelling abroad to another European country, a 5GB data roaming limit will apply. Beyond this, you’ll need to pay 10p/MB.

Price Fair Use Tethering Network

£25/month
650GB/month
12 devices
5G coverage
(powered by O2)
The £25 Always-On goodybag has a speed reduction to 384kbps (0.4Mbps) after 80GB per month.
5GB monthly data roaming limit applies in Europe.

For more information, see our guide to unlimited data on giffgaff.

Lebara Mobile

In the UK, Lebara Mobile currently offers an unlimited data SIM card for £12.50/month for the first 3 months (£25/month thereafter). To get this offer, you’ll need to enter KEN3 as your voucher code at the checkout.

On Lebara’s unlimited data plan, you’ll get 4G & 5G coverage from Vodafone. You’ll also get unlimited UK minutes, unlimited UK texts and 100 international minutes to 42 countries.

For an extra £5/month, you can upgrade this to a plan with unlimited international minutes.

Network Data Monthly Cost
Lebara Mobile
  • Vodafone coverage
  • Unlimited UK mins
  • Unlimited UK texts
  • 100 intl mins
Unlimited
data
£12.50
for 3 months,
then £25 per month
1 month rolling
See deal  
Lebara Mobile
  • Vodafone coverage
  • Unlimited UK mins
  • Unlimited UK texts
  • Unlimited intl mins
Unlimited
data
£15.00
for 3 months,
then £30 per month
1 month rolling
See deal  

If you’re travelling abroad, you can use up to 30GB data per month at no extra cost in Europe. You can also use up to 10GB of data per month at no extra cost in India.

Price Fair Use Tethering Network

£25/month
Subject to general T&C
No restrictions
5G coverage
(powered by Vodafone)
Roaming data limit of 30GB per month in Europe and 10GB per month in India.

For more information, see our guide to Lebara Mobile’s SIM-only deals.

Lycamobile

Lycamobile is a specialist provider of international calling. They offer a Go Endless bundle which costs £25 for 30 days of usage. This gives you unlimited UK minutes, unlimited UK texts and endless UK data, with a fair usage limit of 150GB per month.

Lycamobile also offers the Go Endless Plus bundle. This costs £30 for 30 days of usage. It also includes unlimited international minutes for calling 41 countries.

Network Data Monthly Cost
Lycamobile
  • EE coverage
  • Unlimited UK mins
  • Unlimited UK texts
  • 100 intl mins
Unlimited
data
£25.00
per month
£15 for 3 months
No contract
See deal  

On Lycamobile, the use of tethering and personal hotspot is not permitted. You’ll get access to 4G coverage from O2. You’ll also get 5G coverage if you’re using a 5G-ready Android device.

Price Fair Use Tethering Network

£25/month
Subject to general T&C
Not permitted
5G coverage
(powered by O2)

For more information, you can read our Lycamobile review.

SMARTY

In the UK, SMARTY Mobile is a low-cost sub-brand of Three. At present, they offer unlimited data on Pay As You Go for just £16 per month. The SIM card gives you 4G & 5G coverage from Three, along with unlimited UK minutes and unlimited UK texts.

According to SMARTY, tethering and personal hotspot usage are included in the plan and there are no speed restrictions for using too much data. You can also use an unlimited data SIM card in other devices like your tablet, dongle or mobile broadband router.

Network Data Monthly Cost
Smarty
  • Three coverage
  • Unlimited mins
  • Unlimited texts
Unlimited
data
£16.00
per month
1 month rolling
See deal  

On SMARTY, a 12GB per month fair usage limit applies when you’re travelling abroad in Europe.

Price Fair Use Tethering Network

£16/month
No fair use limit
No restrictions
5G coverage
(powered by Three)
12GB per month data roaming limit applies in European countries.

For more information, see our SMARTY unlimited data review.

Three

You can get an unlimited data SIM card on Three Pay As You Go for £31.50/month. This gives you access to Three’s 5G network, along with unlimited UK minutes and unlimited UK texts.

Network Data Monthly Cost
Three
  • Unlimited mins
  • Unlimited texts
Unlimited
data
£31.50
per month
No contract
See deal  

Unfortunately, Three charges a lot more for unlimited data on Pay As You Go, compared to unlimited data on their Pay Monthly SIM cards. For instance, you can get unlimited data for just £22/month if you’re willing to sign up on a contract with Three. Alternatively, SMARTY offers unlimited data for £16 with no contract & with 5G coverage from Three.

Price Fair Use Tethering Network

£31.50/month
No commercial usage
No restrictions
5G coverage

For more information, see our guide to unlimited data on Three.

Vodafone

On Vodafone’s Pay As You Go service, it’s possible to get an unlimited data SIM card for £40/month. This is available with no contract and no need for a credit check. You’ll also get access to Vodafone’s 5G network on this plan.

This following table shows Vodafone’s Pay As You Go unlimited data plan:

Network Data Monthly Cost
Vodafone
  • Unlimited mins
  • Unlimited texts
Unlimited
data
100Mbps max speed
£40.00
per month
No contract
See deal  

Because of the incredibly high cost for unlimited data on Vodafone Pay As You Go, we wouldn’t normally recommend this plan for most users. Instead, consider Lebara Mobile's £25 unlimited data plan instead. This gives you unlimited data with access to Vodafone’s 4G and 5G network.

Alternatively, you can consider Vodafone’s unlimited data plans on a Pay Monthly contract (available from £30/month).

Price Fair Use Tethering Network

£40/month
Personal use only
No restrictions
5G coverage

For more information, see our guide to Vodafone’s Pay As You Go bundles and Vodafone’s unlimited data plans.

VOXI

VOXI is a low-cost sub-brand of Vodafone. They currently offer unlimited 5G data for £35/month with no contract and no credit check.

VOXI’s unlimited data plan will give you access to Vodafone’s 5G network. This offers an average download speed of 150-200Mbps on 5G.

Network Data Monthly Cost
VOXI
  • Vodafone coverage
  • Unlimited mins
  • Unlimited texts
Unlimited
data
£35.00
per month
1 month rolling
See deal  
Price Fair Use Tethering Network

£35/month
Personal use only
No restrictions
5G coverage
(powered by Vodafone)

For more information, you can read our VOXI review. Alternatively, if you’re looking for a lower-cost alternative, VOXI also offers a selection of endless social media and endless video plans.

More Information

For more information about a specific unlimited data deal, please see the details on your mobile network’s website. In addition, you may find it useful to read our overview of unlimited data plans in the UK and the best Pay As You Go SIM cards.

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