Unlimited Data on Pay As You Go: Unlimited Data SIMs With No Contact

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 £22/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
Vodafone coverage Unlimited mins Unlimited texts	Unlimited data	£19.00 per month 24 month contract	See deal
Vodafone coverage Unlimited mins Unlimited texts	Unlimited data 150Mbps max speed	£22.00 per month 1 month rolling	See deal
Vodafone coverage Unlimited mins Unlimited texts	Unlimited data	£22.00 per month 12 month contract	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.

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
O2 coverage Unlimited mins Unlimited texts	Unlimited data	£25.00 per month 18 month contract	See deal
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.

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
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
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.

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
EE coverage Unlimited UK mins Unlimited UK texts 100 intl mins Offer ends 30th Jun	Unlimited data	£25.00 per month £12.50 for 1 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.

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
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.

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
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 £20/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.

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
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 £24/month).

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
Vodafone coverage Unlimited mins Unlimited texts	Unlimited data	£35.00 per month 1 month rolling	See deal

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.