Unlimited Data No Contract SIM Cards: Pay As You Go Unlimited SIM Cards

giffgaff

On giffgaff, you can get unlimited data with coverage on the O2 network, with a choice of two unlimited data plans:

• The £25 Always On goodybag gives you unlimited data with 4G speeds on the first 80GB per month. After that, 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 access to 5G at no extra cost when it launches on giffgaff. There are no speed reductions on the £35 golden goodybag but there’s a fair usage limit of 650GB per month. In addition, it isn’t possible to tether your phone to more than 12 devices.

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

Tariff	Minutes	Texts	Data	Monthly Cost
	Unlimited	Unlimited	Always-On	£25.00
	Unlimited	Unlimited	Unlimited	£35.00

If you’re travelling abroad to another European country, a 20GB data roaming limit applies on your unlimited data plan from giffgaff. Beyond this, you’ll be surcharged at a rate of 0.36p/MB for further data usage abroad.

For more information, you can read our guide to giffgaff’s Always-On data and to giffgaff’s golden goodybag plans.

Lebara Mobile

In the UK, Lebara Mobile currently offers an unlimited data SIM card for £35/month with 3 months half price. With 4G coverage from the Vodafone network, it also gives you unlimited UK minutes, unlimited UK texts and unlimited international minutes to 41 countries.

Network	Minutes	Texts	Data	Monthly Cost
	Unlimited	Unlimited	Unlimited	£35.00 3 months half price

In addition, you can get £10 of free credit when you port in your existing phone number to Lebara Mobile. When abroad, up to 16.6GB of data can be used in Europe at no extra cost and up to 10GB of data can be used in India at no extra cost.

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

Lycamobile

Lycamobile is a low-cost network, specialising in international phone calls. At present, they offer an unlimited data SIM card from £25 for 30 days of usage. This gives you unlimited UK minutes, unlimited UK texts and 99% 4G coverage from the O2 network. Customers ordering their Lycamobile bundle online will benefit from an introductory price of £19/month for the first 90 days.

As a cheaper alternative to fully unlimited data, there’s also a £20 Forever Data plan on Lycamobile. On this plan, 4G speeds are only available on the first 9GB per month. After the first 9GB per month, your download speeds are reduced to a maximum of 128kbps (around 0.1Mbps, which is roughly equivalent to the speed of a 2G connection).

On Lycamobile, the use of tethering and personal hotspot is not permitted.

For more information, you can read our Lycamobile review.

SMARTY

SMARTY Mobile is a low-cost sub-brand of Three, offering unlimited data with no contract for £20 per month. The SIM card gives you 4G coverage from the Three network, along with unlimited UK minutes and unlimited UK texts.

SMARTY says their unlimited data SIM card is also suitable for use in other devices including your tablet, mobile broadband dongle or 4G home broadband router.

Network	Minutes	Texts	Data	Monthly Cost
	Unlimited	Unlimited	Unlimited	£20.00

On SMARTY’s unlimited data plan, a 20GB per month fair usage limit applies when you’re travelling abroad in Europe. Beyond this, a surcharge will be applied for further usage in Europe.

For more information, see our SMARTY unlimited data review.

Superdrug Mobile

In our opinion, the best value unlimited data plan without a contract in the UK is currently Superdrug Mobile’s £20 unlimited data SIM card. This gives you unlimited minutes, unlimited texts and unlimited data with 4G coverage from the Three network.

Behind the scenes, Superdrug Mobile is built on the SMARTY platform so the two networks share a lot of similarities in how they operate. There are, however, two main benefits to choosing Superdrug Mobile over SMARTY:

• You’ll get £20 back in Superdrug Health and Beautycard points when you sign up for your plan online. That essentially makes your first month free. You can spend the £20 on your next visit to a Superdrug store, or you can spend it online on the Superdrug website (a minimum order of £10 is required for free delivery).
• You’ll also earn double Health and Beautycard points on all your shopping at Superdrug (this is equivalent to an extra 1% back on all of your shopping at Superdrug).

Network	Minutes	Texts	Data	Monthly Cost
	Unlimited	Unlimited	Unlimited	£20.00

The following table shows the key things to know about Superdrug’s unlimited data plan:

For more information, see our Superdrug Mobile review.

Three

You can get an unlimited data SIM card with no contract on Three’s Pay As You Go service from £30/month. This gives you access to Three’s 5G network in 154 UK towns and cities, along with unlimited UK minutes and texts.

Network	Minutes	Texts	Data	Monthly Cost
	Unlimited	Unlimited	Unlimited	£30.00
	Unlimited	Unlimited	Unlimited	£35.00

You should note that much cheaper unlimited data deals are available when you take a SIM-only plan on contract from Three. At present, Three offers unlimited data for just £18/month if you’re willing to sign up a contract. This is much cheaper than their unlimited data plan on Pay As You Go.

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

Vodafone

On Vodafone, it’s possible to get an unlimited data SIM card for £50/month on Pay As You Go, without the need to sign a contract or to undergo a credit check. You’ll also get access to Vodafone’s 5G network included in the price.

This plan is shown in the following table:

Network	Minutes	Texts	Data	Monthly Cost
	Unlimited	Unlimited	Unlimited	£50.00

Because of the incredibly high cost for unlimited data without a contract on Vodafone, we wouldn’t normally recommend this plan for most users. Instead, there are two alternatives that will give you much better value:

• You can get VOXI’s £30 unlimited data SIM card instead. VOXI is a low-cost sub-brand of Vodafone, also offering unlimited data with 5G and no contract.
• If you’re happy to sign up for a contract, Vodafone offers far better unlimited data plans on a Pay Monthly contract. For instance, you can get their unlimited SIM cards from £22/month on a contract (or from £26/month for Unlimited Max without any speed restrictions).

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, currently offering unlimited 5G data with no contract for £30/month.

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, with 5G coverage currently available in 57 UK towns and cities.

Network	Minutes	Texts	Data	Monthly Cost
	Unlimited	Unlimited	Unlimited	£30.00

When using your mobile phone abroad in another European country, there’s a fair usage limit of 25GB per month on this plan.

For more information, you can read our in-depth VOXI review. Alternatively, if you’re looking for a lower-cost alternative to unlimited data, VOXI offers a range of plans with endless social media or endless video data.