Get a free SIM card for your mobile phone: Pay As You Go offerings compared from 16 UK networks.
Whether you’re a smartphone fanatic or someone who only uses their phone on an occasional basis, there are some great deals to be had when you order a free Pay As You Go SIM card in the UK.
The best Pay As You Go SIM cards offer super-low rates that can rival Pay Monthly SIM cards in terms of value for money. To take advantage of the best offers currently available, simply order a free SIM card below and slot it inside your mobile phone. There are no credit checks required and no need to set up a direct debit: simply top-up your SIM card when you need credit to pay for your usage.
In the table below, we’ve reviewed free SIM card offers from 16 of the UK’s most popular Pay As You Go networks. We’ve included mainstream providers as well as lower-cost alternatives. We’ve also compared the cost of each network to help you get the best value for money.
- Changing mobile network? If you’re keeping the same phone but changing to another network, it might be necessary to unlock your phone. See our guides to unlocking an iPhone and unlocking a Samsung Galaxy phone.
- Coverage is identical on lots of mobile networks. Lots of mobile networks share the same coverage provider so you’ll get the same coverage when using any of these networks. To give an example, giffgaff uses coverage from O2. See our list of mobile networks that use coverage from EE, O2, Three and Vodafone.
- Keeping your mobile number. If you’re changing mobile networks, it’s super easy to keep your current phone number. After you order your new Pay As You Go SIM card, get a PAC Code from your old mobile network. You can get one online or by text message. You can then pass this PAC Code on to your new mobile network and your phone number will be moved over on the next working day. For more information, see our guide to transferring your mobile phone number.
Best Pay As You Go SIM Card Offers
At present, giffgaff is our top pick amongst the UK’s Pay As You Go offerings. They offer flexible Pay As You Go bundles, with 99% population coverage from O2.
 |
giffgaff 46% of our readers choose to join giffgaff†
Most giffgaff members choose to buy a goodybag bundle. The most popular bundles are 5GB data for £8, 20GB data for £10 and 35GB data for £15. You can also get 100GB data for £20 per month and Always On data from £25 per month. All of giffgaff’s goodybag bundles come with unlimited minutes, unlimited texts and access to O2’s 5G network. You’ll also benefit from fixed UK prices until the end of 2023. If you’re using giffgaff on a pure Pay As You Go basis, just choose the ‘free SIM’ option when you place your order. With this option, there’s no need to top-up your phone every month. Your credit also won’t expire providing you use your SIM card at least once every six months. On pure Pay As You Go, you’ll pay 25p/minute, 10p/text and 10p/MB. You’ll also get free calls and texts to other giffgaff members as long as you’ve topped up in the past 3 months. |
Another popular choice amongst readers of our website is 1pMobile. On 1pMobile, you can get a classic Pay As You Go plan with rates of just 1p/minute, 1p/text and 1p/MB.
 |
1pMobile 11% of our readers choose to join 1pMobile†
On 1pMobile, you’ll need to top-up your phone with £30 of credit to get going. After the first year, you’ll then need to top-up your SIM card with at least £10 of credit every 120 days. This is equivalent to adding £2.50 of Pay As You Go credit each month. For this reason, we’d only recommend choosing 1pMobile if your average spend will exceed £2.50 per month (otherwise, a non-refundable balance would build up over time on your account). Order 1pMobile SIM card (Free with £30 top-up) → As a special offer for readers of this website, you can get a 4GB Data Boost for free when you activate a new 1pMobile SIM card. Simply order your SIM card through this link and enter VAKTT4GB as your voucher code at the checkout. |
Other major Pay As You Go providers include:
 |
EE 5% of our readers choose to join EE†
EE’s Pay As You Go service is capped at a maximum download speed of 25Mbps. Your Pay As You Go pack will last for 30 days but you can roll over any unused data within 7 days of your previous pack expiring. For light users who opt out of buying a Pay As You Go pack, calls will cost 40p/minute and texts will cost 20p each. You’ll need to buy a one-month pack if you want to use mobile data on your phone. For more information, read our EE Pay As You Go review. |
 |
O2 4% of our readers choose to join O2†
One of the key benefits of joining O2 as a Pay As You Go customer is the fact you’ll get access to discounts and offers through O2 Priority. This includes a range of freebies every week including coffee, drinks and sausage rolls. If you join O2 on the Big Bundles plans, you can get £10 of free credit when you order your SIM card through this link. Once you’ve activated your SIM, you’ll need to text FREE10 to 21500. For more information, see our O2 Pay As You Go review. |
 |
Three 2% of our readers choose to join Three†
For customers not buying a Pay As You Go bundle, Three charges 35p/minute, 15p/text and 10p/MB. Order Three SIM card (Free with £10 top-up) → For more information, you can read our Three Pay As You Go review. Three also operates a low-cost Pay As You Go sub-brand called SMARTY Mobile that offers one-month rolling plans from £5 per month. |
 |
Vodafone 3% of our readers choose to join Vodafone†
Regular mobile users can buy a 30-day Big Value Bundle. For instance, a £10 monthly top-up will give you 7GB of data along with unlimited UK minutes and unlimited UK texts. You can rollover unused allowances when you automatically renew your bundle. Light mobile users can choose Vodafone’s Pay As You Go 1 plan instead. On Pay As You Go 1, you’ll pay £1/day for unlimited minutes, unlimited texts and 50MB of data. This is only charged on the days that you use your mobile phone. |
If you’re using 
On O2’s Pay As You Go service, you’ll currently get up to 10GB data for £10 per month. You’ll also get unlimited UK minutes and unlimited UK texts included.
Three offers a Pay As You Go service with Data Pack bundles from £10. A monthly top-up of £10 on Three will give you 10GB of data, along with unlimited UK minutes and unlimited UK texts. You can use the allowances from your bundle inside the UK and when you travel abroad in 
Vodafone offers a choice of two plans on their Pay As You Go SIM card.The following virtual network operators also offer a Pay As You Go service:
|
1pMobile 11% of our readers choose to join 1pMobile†
On 1pMobile, you’ll pay 1p/minute, 1p/text and 1p/MB. There’s no monthly charge for using your 1pMobile SIM card but you’ll need to add £10 of new credit every 120 days (equivalent to adding £30 of new credit each year). If you don’t top-up your SIM with at least £10 of credit every 120 days, your account will be closed and your phone number will be lost. For this reason, 1pMobile is not suitable for very light users only wanting a SIM card for emergency usage. You’ll get 4G & 5G coverage from EE when you use a 1pMobile SIM card inside your mobile phone. |
 |
ASDA Mobile 6% of our readers choose to join ASDA Mobile†
For just £4 per month, you can get an ASDA Mobile bundle with unlimited UK minutes and texts. You can upgrade this with 3GB data for £5, 5GB data for £7 or 12GB data for £10. You’ll get access to Vodafone’s 4G network on all ASDA Mobile plans. In addition, bundles costing £10/month or more will give you access to Vodafone’s 5G network. |
 |
CMLink 2% of our readers choose to join CMLink†
CMLink is a Pay As You Go provider that’s designed for customers with a connection to China. You can buy a one-month bundle such as 500 minutes, unlimited texts and 10GB data for £9/month. This also includes an allowance of international minutes, along with an allowance of roaming data for use in the EU, Mainland China and Hong Kong. In the UK, customers on CMLink will get access to 4G and 5G coverage on EE. |
|
giffgaff 46% of our readers choose to join giffgaff†
Heavy data users can get 35GB of data for £15/month or 100GB of data for £20/month. Always On data is available from £25/month, with fully unlimited data available from £35/month. For more information, see the giffgaff website. |
 |
iD Mobile 2% of our readers choose to join iD Mobile†
iD Mobile is the own-brand mobile network from the Carphone Warehouse. They offer 3G & 4G coverage from Three. Customers on iD Mobile Pay As You Go can buy a bundle such as unlimited minutes, unlimited texts and 6GB data for £10/month. Usage outside of your bundle will cost 3p/minute, 2p/text and 1p/MB. |
 |
Lebara Mobile 2% of our readers choose to join Lebara Mobile†
In the UK, Lebara Mobile offers Pay As You Go bundles from £5 per month. Alongside the usual allowance of UK minutes, texts and mobile data, you’ll get an allowance of international minutes for calling 42 other countries. As a special offer for readers of this website in May 2023, you can get 3 months half price when you enter KEN3 as your voucher code at checkout. This makes it possible to get 5GB data for £2.50 and 8GB data for £3.50. You can also get a Lebara Mobile unlimited data plan from £12.50 per month. Lebara Mobile offers 4G & 5G coverage from Vodafone. For more information, see our Lebara Mobile review. |
 |
Lyca Mobile 1% of our readers choose to join Lyca Mobile†
Lyca Mobile is a low-cost Pay As You Go mobile network, offering access to 4G & 5G coverage from O2. At present, they offer a range of introductory deals such as 3GB data for £0.99, 20GB data for £5, and 100GB data for £7. You can benefit from these discounted prices for up to six months. You’ll also get an inclusive allowance of international minutes. For more information, see our Lycamobile review. |
 |
RWG Mobile 5% of our readers choose to join RWG Mobile†
RWG Mobile calls itself “the mobile network for Wales”. They offer coverage from the EE network, along with bilingual customer support in both English and Welsh. |
 |
Talk Home Mobile
In the UK, Talk Home Mobile offers Pay As You Go plans with access to 4G & 5G coverage from EE. Talk Home offers Pay As You Go bundles from £5 per month. For instance, you’ll get unlimited UK minutes, unlimited UK texts and 20GB data for £10. Alternatively, you can choose their ‘Penny Pro’ plan which has no regular monthly fees. On the ‘Penny Pro’ plan, you’ll pay just 1p/minute, 1p/text and 1p/MB. You’ll need to manually opt-in again every 30 days to benefit from this plan. |
 |
Tesco Mobile 3% of our readers choose to join Tesco Mobile†
Regular mobile users can buy a Rocket Pack bundle from £7.50/month. However, the most popular Rocket Pack bundle costs £10/month and gives you 5000 minutes, 5000 texts and 10GB of data. For light users not wanting to buy a Rocket Pack, it’s possible to switch to the Triple Credit plan. Here, you’ll pay 25p/minute, 10p/text and 10p/MB. Whenever you top-up your SIM card by £10 per month, you’ll get £20 of bonus credit that lasts for one month. This essentially triples the amount of credit you have to use in that month. For more information, read our Tesco Mobile Pay As You Go review. |
 |
Vectone Mobile 2% of our readers choose to join Vectone Mobile†
Vectone Mobile is a specialist provider of international calling. See our international calls price comparison table to see how Vectone Mobile compares to rival networks. |
 |
VOXI 6% of our readers choose to join VOXI†
All of VOXI’s Pay As You Go plans come with unlimited social media data. This means you’re able to use Snapchat, Instagram, WhatsApp, Facebook, Twitter, Pinterest and Facebook Messenger without it eating into your data allowance. For unlimited video, you can choose one of VOXI’s unlimited video plans from £15/month. With unlimited video, you can use TikTok, YouTube, Amazon Prime Video, Netflix, My5, TV Player, UKTV Play and more without it eating into your data plan. Most VOXI customers decide to convert their Pay As You Go credit into a one-month bundle. However, if you decide not to do this, you can use VOXI on a traditional Pay As You Go basis at 30p/minute and 14p/text. You’ll need to buy a bundle from VOXI to access the internet. For more information, see our VOXI review. |
ASDA Mobile offers Pay As You Go bundles with 99% population coverage from the Vodafone network.
giffgaff is a low-cost mobile network with coverage from O2. They currently offer 5GB data on their 
Tesco Mobile offers a choice of two Pay As You Go tariffs: 
VOXI is Vodafone’s low-cost For more information about any of the SIM cards listed on this page, please click through to the mobile network’s website. Our recommended deal is currently to order a free SIM card from giffgaff.
If you’re asked to specify the size of SIM card required in your phone (e.g. Standard SIM, Micro SIM or Nano SIM), see our guide to smartphone SIM card sizes. Alternatively, if you need an eSIM, see our guide to eSIM on UK mobile networks and the best eSIM plans.
The “£10 top-up buys” calculation is based on a user who tops up by £10 every month. If you top up less than once per month, your allowances may run out before the next top-up.
† Statistics on mobile network chosen by readers of this article. Based on the number of Free SIM click-throughs from the 23rd February 2023 to 22nd May 2023.
Frequently Asked Questions
| What are the best Pay As You Go SIM cards currently available? | There are numerous Pay As You Go SIM card offers currently available. The following SIM cards are currently the most popular:
|
|---|---|
| How does coverage compare across different Pay As You Go SIMs? | In the UK, all Pay As You Go networks use one of the four following network coverage providers:
|
| Which Pay As You Go SIM cards offer 5G coverage? | At present, 5G coverage is available on the following Pay As You Go SIM cards:
For more information, see our guide to 5G SIM-only deals and 5G Pay As You Go SIM cards. |
| What are the best Pay As You Go SIM cards for light usage? | There are a number of important considerations for light mobile users which are discussed in more detail here. However, for most people, we think the following Pay As You Go networks are worth considering:
|
| Are there any Pay As You Go SIM cards that don’t expire? | Yes. If you choose a traditional Pay As You Go plan, there’s no need to top-up your phone every month. You’ll just need to keep your SIM card active. This normally means using it for a chargeable activity at least once every 180 days. |
| Will I need to undergo a credit check for Pay As You Go SIM cards? | No. You can get a free Pay As You Go SIM card without the need for a credit check. |
| Can I keep my current phone number when changing network? | Yes. It’s easy keeping your current phone number when moving to a new Pay As You Go network. Simply get a PAC Code from your current network, and give it to your new mobile network once you’ve signed up. |
More Information
For more information, see our guide to Pay As You Go deals in the UK. You can also read our in-depth mobile network reviews and our guide to the best SIM-only deals.
Graham said:
An interesting and Informative but I had hoped that the comparison would show which sims supported wifi calling, which is needed when living in the sticks.
Ken replied:
Hi Graham,
Thanks for your comment. Take a look at my guide on Wi-Fi Calling & 4G Calling for more information about this 🙂
Hope this helps,
Ken
Gray said:
Hi Ken, can i get a free sim, pay for one month and only use free text and calls without having to top up again?
Ken replied:
Hi Gary,
Thanks for your comment. Most mobile networks impose a condition on the free calls and texts (e.g. you’ll need to have topped up in the last 3 months to get the free calls and texts to other customers on the same network).
Hope this helps,
Ken
William Hodgson said:
ASDA Mobile are increasing their PAYG prices from 16 September:
calls 15p per minute (currently 4p)
texts 10p (currently 4p)
data 10p per MB (currently 4p)