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Best pay as you go SIM deals 2024: Get discounts from top mobile networks, based on our real-world survey

Best unlimited data SIM. Smarty, Lebara, Voxi and iD Mobile SIM cards on a wooden table

We’ve picked out the best pay as you go SIM deals for you, based on the results of Expert Reviews' annual survey of over 4,000 customers

The best pay as you go SIM deals from the country’s top mobile networks are perfect for people who don’t want to get tied into a long-term contract. You can cancel them whenever you like, helping you dodge the price rises, while serving up bags of 5G data. But which should you pick? I’m here to help.

To help you find the best pay as you go SIM deal for your needs, I’ve used my years of bargain-hunting experience to round them up below. There’s something for everyone here and all of the recommendations are based on our in-depth reviews and the results of the annual Expert Reviews Mobile Network Awards, in which we ask over 4,000 mobile network customers about their experience. If a network didn’t get a positive write-up from us, I simply won’t include it on the list below.

Read on to find the offer that best fits your needs or scroll further down for my easy-to-understand buying guide and more information about why I select certain deals over others.

Get a huge data boost from five-star Voxi

Voxi, which our customer survey found to be the best mobile network in the UK, is serving up 90GB of 5G data for just £15/mth on a rolling, 30-day plan, as well as unlimited use of social media, video and music apps such as Instagram, TikTok, Snapchat, WhatsApp, YouTube, Netflix, Spotify, Apple Music and many more. That’s a massive increase on the usual 30GB.


Best pay as you go SIM deals: At a glance

Best dealVoxi (90GB for £15/mth)View deal at Voxi
Best unlimited dealSmarty (unlimited for £16/mth)View deal at Smarty
Best cheap dealiD Mobile (60GB for £10/mth)View deal at iD Mobile
Best for calling abroadLebara (30GB for £15/mth)View deal at Lebara

The best pay as you go SIM deals you can buy in 2024

1. Voxi: The best pay as you go SIM deal

Price: £15/mth | View deal at Voxi

A black Voxi SIM card on a wooden table

Data90GB, plus unlimited use of social media, music and video apps
Price per gigabyte17p
Unlimited calls/textsYes
Plan length30 days
Percentage of existing customers who would recommend Voxi*92%
Last reviewed by Expert ReviewsNovember 2023

*According to the results of the Expert Reviews Mobile Network Awards 2023 survey

Benefits: Vodafone-powered mobile virtual network operator (MVNO) Voxi was the worthy recipient of five stars out of five and an Expert Reviews Best Buy award in our in-depth Voxi review.

We sang the praises of its dazzling deals, commitment-free plans, rock-solid reliability and top-tier performance. That was backed up by Voxi taking home the overall winner of our annual Mobile Network Awards, as well as scooping the Best Value and Most Reliable gongs.

For just £15/mth on a rolling, one-month plan, you’ll be treated to 90GB of 5G data (up from the usual 30GB) and unlimited usage of social media, video and music apps. That means you’ll be able to use TikTok, Instagram, Spotify, Netflix, Amazon Prime Video, Snapchat, YouTube, Apple Music and Twitter, among others, and it won’t come out of your 90GB allocation. I recommend getting in there quickly, though, as this deal likely won’t last for long.

Drawbacks: Voxi is slightly more expensive than Smarty and iD Mobile (both listed below), and it charges £2.25 per day to unlock 20GB of roaming data in the EU.

Read our full Voxi review

Voxi pay as you go SIM plans

£10/mth: 30GB of data (was 15GB), plus unlimited social media
£12/mth:
20GB of data, plus unlimited social media and music
£15/mth:
90GB of data (was 30GB), plus unlimited social media, video and music
£20/mth:
100GB of data, plus unlimited social media, video and music
£30/mth (was £35/mth):
Unlimited data
All plans last 30 days
View deal at Voxi

2. Smarty: The best pay as you go deal with unlimited data

Price: £16/mth |  View deal at Smarty

A Smarty SIM card lying on a wooden table

DataUnlimited
Price per gigabyteN/A
Unlimited calls/textsYes
Plan length30 days
Percentage of customers who would recommend Smarty*92%
Last reviewed by Expert ReviewsNovember 2023

*According to the Expert Reviews Mobile Network Awards 2023 survey

Benefits: Smarty, an MVNO that uses Three’s network, may no longer be the champion of our Mobile Network Awards – after winning in 2022 – but it still gained four stars out of five and an Expert Reviews Recommended award in our most recent Smarty review.

In particular, we highlighted its cheap data deals (such as the one I’m shining a light on here), excellent 5G performance, free EU roaming up to a fair use limit of 12GB and impressive customer service scores in the Expert Reviews Best Mobile Network Awards survey, where it finished as runner-up behind Voxi.

And this is my pick of its 30-day, rolling plan at the moment: unlimited 5G data for just £16/mth, down from the usual £20/mth, plus the usual unlimited UK texts and minutes. That’s by far the best unlimited pay as you go SIM deal around.

Drawbacks: As with all networks, the customer service satisfaction score has dropped to 63% from the dizzy heights of 81% last year and the sheer number of plans is bewildering.

Read our full Smarty review

Smarty pay as you go SIM plans

£6/mth: 5GB of data
£7/mth: 8GB of data
£8/mth: 50GB of data (was 16GB)
£10/mth: 40GB of data
£12/mth: 100GB of data
£15/mth: 150GB of data
£17/mth: 250GB of data
£16/mth (was £20/mth): Unlimited data
All plans last 30 days
View deal at Smarty

3. iD Mobile: The best cheap pay as you go SIM deal

Price: £10/mth | View deal at iD Mobile

An iD Mobile SIM card lying on a wooden table

Data60GB
Price per gigabyte17p
Unlimited calls/textsYes
Plan length30 days
Percentage of customers who would recommend iD Mobile*79%
Last reviewed by Expert ReviewsNovember 2023

*According to the Expert Reviews Mobile Network Awards 2023 survey

Benefits: If you’re looking to get as much bang for your buck as possible at the moment, iD Mobile is here to help. The MVNO, which piggy-backs on Three’s expansive network, is serving up 60GB of 5G data for just £10/mth on a rolling, one-month plan. That’s excellent value for money if you don’t need masses of data for, say, streaming while out and about.

In our in-depth, four-star iD Mobile review, we praised the company’s outstanding offers (such as the one above), excellent 5G performance and free EU roaming up to a fair use limit of 30GB. That’s one of the most generous allowances on the market for those heading abroad.

Drawbacks: Customer service needs to be improved. As our reviewer, Stuart Andrews, explained: “just 17% of customers told us they were very satisfied with iD Mobile, with an additional 36% fairly satisfied”. That’s unfortunately well below other networks on this list.

Read our full iD Mobile review

iD Mobile pay as you go SIM plans

£6/mth: 5GB of data
£7/mth:
15GB of data
£8/mth:
25GB of data
£9/mth:
36GB of data
£10/mth:
60GB of data
£12/mth:
100GB of data
£14/mth:
200GB of data
£15/mth:
250GB of data
£16/mth: 300GB of data
£18/mth: Unlimited data
All plans last 30 days
View deal at iD Mobile

4. Lebara: The best pay as you go SIM deal for calling abroad

Price: £15/mth | View deal at Lebara

A blue Lebara SIM card on a wooden table

Data30GB
Price per gigabyte50p
Unlimited calls/textsYes, plus 500 international minutes
Plan length30 days
Percentage of customers who would recommend Lebara*95%
Last reviewed by Expert ReviewsNovember 2023

*According to the Expert Reviews Mobile Network Awards 2023 survey

Benefits: If you regularly call friends and family overseas, this is the pay as you go SIM deal I recommend. For £15/mth on a rolling, 30-day plan, you’ll get 30GB of 5G-enabled data and 500 international minutes to 42 countries around the world, including the EU, India, the US, Australia and China. What’s more, you’ll be able to use your 30GB data allocation when travelling in the EU or India, which makes Lebara, an MVNO that runs on Vodafone’s network, one of the most generous providers in this regard.

In our most recent Lebara review, we awarded it four stars out of five and an Expert Reviews Recommended award for its value for money and international minutes. In the words of our reviewer, “as a cheap and cheerful mobile network, Lebara has a lot to give”.

Drawbacks: Disappointing customer service results, with just over 50% of those who responded to our survey saying they were satisfied with the level of customer service they received.

Read our full Lebara review

Lebara pay as you go SIM plans

£5/mth: 5GB of data, plus 100 international minutes
£10/mth: 20GB of data, plus 100 international minutes
£15/mth: 30GB of data, plus 500 international minutes
£20/mth: 30GB of data, plus unlimited international minutes
£25/mth: Unlimited data, plus 100 international minutes
£30/mth: Unlimited data, plus unlimited international minutes
All plans last 30 days
View deal at Lebara

Why are other mobile networks not on the list?

A few big players are missing from the roundup above, but there’s a good reason I’ve left them out. The verdicts in our in-depth reviews or their results in the Expert Reviews Best Mobile Network Awards simply weren’t good enough for me to recommend their pay as you go SIM deals here. Below, you’ll find a short list of the other major providers and why they didn’t make the cut above.

1. Three: Poor customer service

Despite posting good 5G performance and coverage results in our annual survey, Three only picked up three stars out of five in our full review. That was mainly because we couldn’t ignore its mediocre customer service feedback in our Mobile Network Awards, where only 56% of respondents said they were satisfied with the company’s support.

Read our full Three review

View deals at Three

2. Vodafone: Lacklustre performance

Vodafone also received a middle-of-the-road three-star rating in our in-depth review. While its bundles and flexible plans caught the eye, it was let down by average performance scores, below-average customer service and EU roaming charges. You can get far better value for money with one of the mobile virtual mobile network operators listed above.

Read our full Vodafone review

View deals at Vodafone

3. O2: Let down by high prices

While there are things to like about O2’s offering, such as head-turning extras and free roaming in the EU up to a fair use limit of 25GB, the mobile network still received three stars out of five due to its speeds that lag behind the competition, sub-par customer service scores and high prices.

Read our full O2 review

View deals at O2

How do I find the best pay as you go SIM deals on the market?

A blackVoxi SIM card, a nano SIM and a nano SIM in a SIM tray on a wooden table
As Expert Reviews’ deals editor, it’s my job to uncover the best offers that will save you money, provide a great service and be free of any irritating pitfalls. In this section, I’ve summarised some of the factors I bear in mind when hunting for deals and you can read more about the methodology in this dedicated article.

What is the mobile network like?

Expert Reviews by name, expert reviews by nature: we bring together experts in their fields to produce in-depth reviews based on their years of testing experience. That means every deal you see in the list above will be based on our most recent in-depth review, along with the results of the Expert Reviews Mobile Network Awards customer survey. If a mobile network isn’t as good as the others or we haven’t reviewed it, I won’t recommend one of its pay as you go SIM deals.

Is there a price range?

At Expert Reviews, we realise that people have very different budgets and requirements, especially in the midst of a cost of living crisis. That means I’ll always ensure that there’s always a budget-friendly plan in the roundup, while including all of the other options from the same provider in handy tables.

Are there any hidden catches?

One of the great things about 30-day, pay as you go SIM deals is that you’re immune to mid-contract price increases. Unfortunately, these are now common, with many mobile networks taking the decision to hike costs by the Consumer Price Index rate of inflation plus an extra 3.9% every spring. With a pay as you go plan, however, you can simply jump ship whenever you like.

That said, I’ll still scour the small print for other hidden booby traps, such as capped download speeds (something that EE likes to do), and either make you aware of them in the mini reviews or not recommend the deal in the first place.


How to pick the best pay as you go SIM deal for you

Three SIM cards, one in a SIM tray, on a wooden table

If you’ve perused my list of the best pay as you go SIM deals, but aren’t sure where to begin, fret not: I’ve put together a short buying guide below to help you tackle the main hurdles with ease.

How much data do you need?

Nowadays, there’s a huge range of pay as you go plans designed for different types of users. There are a few rules of thumb, though. If you mainly use your phone when connected to Wi-Fi and only do a bit of browsing or streaming on mobile data, then 20GB to 50GB should be enough.

Conversely, if you spend a lot of time on social media, scrolling through TikTok, watching Netflix and listening to Spotify, I would recommend stepping up to a 100GB or unlimited deal. These tend to be more cost-effective than the lower-data plans too.

Speaking of which, a data allowance under 10GB is unlikely to be enough for all but the most frugal users. It’s best to be generous with your allocation as you don’t want to pay through the nose if you exceed it.

How long should the contract be?

All of the deals above last for 30 days, which means you can be a lot more flexible about jumping ship to a better offer. That said, our list of the best SIM only deals includes longer-term contracts that are much cheaper per month, although you should watch out for mid-contract price hikes as these are now far more common.

What speeds can you get?

The 5G rollout across the UK has continued apace and a large part of the country is now covered, although many of us still have to make do with 4G. To check what you can get in your neck of the woods, head over to Ofcom’s handy tool and type in your postcode.

Note that virtual mobile network operators (MVNOs) such as Voxi and Smarty run on one of the main four networks – in this case, Vodafone and Three respectively – so make sure to double-check the host network before signing up.

Will you be able to roam for free?

Free EU roaming is something of a luxury these days, with only a few mobile networks offering it – and even then only under a daily cap. Other networks will charge you a daily fee to access your allowance while on the continent and charges will increase steeply if you’re heading further afield.

It’s worth keeping an eye on our dedicated roundup of the best roaming SIM only deals to get the most for your money.

Read more

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