MoneySavingExpert Founder, Martin Lewis · Editor-in-Chief, Marcus Herbert Chair, Martin Lewis · Editor, Marcus Herbert

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See our top picks of the cheapest Sim only deals
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It's SIMple to switch your Sim...

Sim prices have dropped significantly in recent years. At the same time, around 14 million people are out of contract on their mobile. Not sure if you're one of them? Find out for FREE by texting INFO to 85075. You'll get an instant reply showing whether you owe anything to leave your provider (if you're with Three, Smarty, or iD Mobile, you'll need to reply with your date of birth to get the details).

– Martin Lewis

4GB to 9GB Sims – what we'd go for

At this data level, our top pick is this 5GB/month Lebara Sim (uses Vodafone's network). It's £1.30/month for the first six months, then £4.90/month thereafter. Over 12 months, it's equivalent to £3.10/month, but it’s a one-month rolling contract, so you can cancel at any time.

Right now, you can get 10GB/month for even less with the deal below.

 
5G data 5GB
Mins/texts Unlimited
Contract 1mth
'Free' Roaming 37 countries
Unltd minutes and texts
Signal level Uses Vodafone's network
Lebara
Customer service
Months 1-6
£1.30/mth
Thereafter
£4.90/mth
Equiv cost: Equivalent cost: 
£3.10/mth
Ends 11.59am Tue (16 Dec)
Get deal via Lebara*

10GB to 30GB Sims – what we'd go for

At this data level, our top pick is this 15GB/month iD Mobile Sim (uses Three's network). It's £3.50/month for the first three months, then £7/month. Plus, you'll be emailed a £31.50 Amazon or shopping voucher within four months. If you'd have spent there anyway, factor it in and it's equivalent to £3.50/month over the 12-month contract.

 
5G data 15GB
Mins/texts Unlimited
Contract 12mth
'Free' Roaming 50 countries
£31.50 Gift card
Unltd minutes and texts
Signal level Uses Three's network
iD Mobile
Customer service
Months 1-3
£3.50/mth
Months 4-12
£7/mth
Gift card
£31.50
Equiv cost: Equivalent cost incl reward: 
£3.50/mth
Ends 11.59pm Thu (18 Dec)
Get deal via iD Mobile*

31GB to 150GB Sims – what we'd go for

At this level, our top pick is this 50GB/month iD Mobile Sim (uses Three's network). It's £2/month for the first three months, then £8/month. Plus, you'll be emailed a £30 Amazon or shopping voucher. If you'd have spent there anyway, factor it in and it's equivalent to £4/month, but it’s a one-month rolling contract, so you can cancel at any time.

If you want more data, then there's this 100GB/month Lebara Sim (uses Vodafone's network). It's £3.75/month for the first eight months, then £11.90/month thereafter. Over 12 months it's equivalent to £6.47/month, but it’s a one-month rolling contract, so you can cancel at any time.

 
5G data 50GB
Mins/texts Unlimited
Contract 12mth
'Free' Roaming 50 countries
£30 Gift card
Unltd minutes and texts
Signal level Uses Three's network
iD Mobile
Customer service
Months 1-3
£2/mth
Months 4-12
£8/mth
Gift card
£30
Equiv cost: Equivalent cost incl reward: 
£4/mth
Ends 11.59pm Thu (18 Dec)
Get deal via iD Mobile*
 
5G data 100GB
Mins/texts Unlimited
Contract 1mth
'Free' Roaming 37 countries
Unltd minutes and texts
Signal level Uses Vodafone's network
Lebara
Customer service
Months 1-8
£3.75/mth
Thereafter
£11.90/mth
Equiv cost: Equivalent cost: 
£6.47/mth
Ends 11.59am Tue (16 Dec)
Get deal via Lebara*

Unlimited Sims – what we'd go for

For the data fiends who don’t want to worry about ever running out, there's this unlimited Sim with iD Mobile (uses Three's network). It's £8/month for the first three months, then £16/month. But you'll also be emailed (do check your spam folders) a £11.50 Amazon or shopping voucher within four months. If you were planning on spending there, factor it in and it's equivalent to £13.05/month over the 12-month contract.

Do note, some networks limit the download speeds of unlimited Sims. This is known as throttling. We haven't included Sims that do that here, but it's worth watching out for.

 
5G data UnltdUnltd
Mins/texts Unlimited
Contract 12mth
'Free' Roaming 50 countries
£11.50 Gift card
Unltd minutes and texts
Signal level Uses Three's network
iD Mobile
Customer service
Months 1-3
£8/mth
Months 4-12
£16/mth
Gift card
£11.50
Equiv cost: Equivalent cost incl reward: 
£13.05/mth
Ends 11.59pm Thu (18 Dec)
Get deal via iD Mobile*
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Your top deals

Sort by
Sorted by Equivalent Monthly Cost

Your top deals

MSE top pick
 
5G data 5GB
Mins/texts Unlimited
Contract 1mth
'Free' Roaming 37 countries
Unltd minutes and texts
Signal level Uses Vodafone's network
Lebara
Customer service
Months 1-6
£1.30/mth
Thereafter
£4.90/mth
Equiv cost: Equivalent cost: 
£3.10/mth
Ends 11.59am Tue (16 Dec)
Get deal via Lebara*
 
5G data 5GB
Mins/texts Unlimited
Contract 1mth
'Free' Roaming 39 countries
Unltd minutes and texts
Signal level Uses EE's network
Spusu
Customer service
Monthly cost
£4.50/mth
 
5G data 5GB
Mins/texts Unlimited
Contract 12mth
'Free' Roaming 45 countries
Unltd minutes and texts
Signal level Uses Vodafone's network
Asda
Customer service
Monthly cost
£4.50/mth
 
5G data 5GB
Mins/texts Unlimited
Contract 24mth
'Free' Roaming 45 countries
Unltd minutes and texts
Signal level Uses Vodafone's network
Asda
Customer service
Monthly cost
£4.50/mth
 
5G data 7GB
Mins/texts Unlimited
Contract 12mth
'Free' Roaming 34 countries
Unltd minutes and texts
Signal level Uses EE's network
Talk Home
Customer service
Monthly cost
£5/mth
Filters Sort

Your top deals

Sort by
Sorted by Equivalent Monthly Cost

Your top deals

MSE top pick
 
5G data 15GB
Mins/texts Unlimited
Contract 12mth
'Free' Roaming 50 countries
£31.50 Gift card
Unltd minutes and texts
Signal level Uses Three's network
iD Mobile
Customer service
Months 1-3
£3.50/mth
Months 4-12
£7/mth
Gift card
£31.50
Equiv cost: Equivalent cost incl reward: 
£3.50/mth
Ends 11.59pm Thu (18 Dec)
Get deal via iD Mobile*
 
5G data 10GB
Mins/texts Unlimited
Contract 1mth
'Free' Roaming 39 countries
Unltd minutes and texts
Signal level Uses EE's network
Spusu
Customer service
Monthly cost
£5.90/mth
 
5G data 15GB
Mins/texts Unlimited
Contract 1mth
'Free' Roaming 47 countries
Unltd minutes and texts
Signal level Uses Vodafone's network
TalkMobile
Customer service
Monthly cost
£5.95/mth
 
5G data 12GB
Mins/texts Unlimited
Contract 12mth
Roaming No
£37 Automatic cashback
Unltd minutes and texts
Signal level Uses Three's network
Three
Customer service
Until 31 Mar 26
£9/mth
After 1 Apr 26 price rise
£10.90/mth
Automatic cashback
£37
Equiv cost: Equivalent cost incl cashback: 
£7.35/mth
 
5G data 25GB
Mins/texts Unlimited
Contract 12mth
Roaming No
£25 Gift card
Unltd minutes and texts
Signal level Uses Vodafone's network
Vodafone
Customer service
Until 31 Mar 26
£8/mth
After 1 Apr 26 price rise
£10.50/mth
Gift card
£25
Equiv cost: Equivalent cost incl reward: 
£7.80/mth
Filters Sort

Your top deals

Sort by
Sorted by Equivalent Monthly Cost

Your top deals

MSE top pick
 
5G data 50GB
Mins/texts Unlimited
Contract 12mth
'Free' Roaming 50 countries
£30 Gift card
Unltd minutes and texts
Signal level Uses Three's network
iD Mobile
Customer service
Months 1-3
£2/mth
Months 4-12
£8/mth
Gift card
£30
Equiv cost: Equivalent cost incl reward: 
£4/mth
Ends 11.59pm Thu (18 Dec)
Get deal via iD Mobile*
 
5G data 50GB
Mins/texts Unlimited
Contract 1mth
'Free' Roaming 37 countries
Unltd minutes and texts
Signal level Uses Vodafone's network
Lebara
Customer service
Months 1-6
£1.85/mth
Thereafter
£7.90/mth
Equiv cost: Equivalent cost: 
£4.88/mth
Ends 11.59am Tue (16 Dec)
Get deal via Lebara*
 
5G data 60GB
Mins/texts Unlimited
Contract 12mth
'Free' Roaming 50 countries
£25 Automatic cashback
Unltd minutes and texts
Signal level Uses Three's network
iD Mobile
Customer service
Monthly cost
£8/mth
Automatic cashback
£25
Equiv cost: Equivalent cost incl cashback: 
£5.92/mth
MSE top pick
 
5G data 100GB
Mins/texts Unlimited
Contract 1mth
'Free' Roaming 37 countries
Unltd minutes and texts
Signal level Uses Vodafone's network
Lebara
Customer service
Months 1-8
£3.75/mth
Thereafter
£11.90/mth
Equiv cost: Equivalent cost: 
£6.47/mth
Ends 11.59am Tue (16 Dec)
Get deal via Lebara*
 
4G Data 50GB
Mins/texts Unlimited
Contract 12mth
Roaming No
£25 Gift card
Unltd minutes and texts
Signal level Uses Vodafone's network
Vodafone
Customer service
Until 31 Mar 26
£9/mth
After 1 Apr 26 price rise
£10.50/mth
Gift card
£25
Equiv cost: Equivalent cost incl reward: 
£8.05/mth
Filters Sort

Your top deals

Sort by
Sorted by Equivalent Monthly Cost

Your top deals

Do you really need unlimited data?

There are cheaper options available for 50GB, 100GB and 120GB data packages.

MSE top pick
 
5G data UnltdUnltd
Mins/texts Unlimited
Contract 12mth
'Free' Roaming 50 countries
£11.50 Gift card
Unltd minutes and texts
Signal level Uses Three's network
iD Mobile
Customer service
Months 1-3
£8/mth
Months 4-12
£16/mth
Gift card
£11.50
Equiv cost: Equivalent cost incl reward: 
£13.05/mth
Ends 11.59pm Thu (18 Dec)
Get deal via iD Mobile*
 
5G data UnltdUnltd
Mins/texts Unlimited
Contract 12mth
Roaming No
£67 Automatic cashback
Unltd minutes and texts
Signal level Uses Three's network
Three
Customer service
Until 31 Mar 26
£17/mth
After 1 Apr 26 price rise
£19.30/mth
Automatic cashback
£67
Equiv cost: Equivalent cost incl cashback: 
£13.15/mth
 
5G data UnltdUnltd
Mins/texts Unlimited
Contract 12mth
'Free' Roaming 50 countries
£20 Automatic cashback
Unltd minutes and texts
Signal level Uses Three's network
iD Mobile
Customer service
Monthly cost
£15/mth
Automatic cashback
£20
Equiv cost: Equivalent cost incl cashback: 
£13.34/mth
 
5G data UnltdUnltd
Mins/texts Unlimited
Contract 1mth
'Free' Roaming 50 countries
Unltd minutes and texts
Signal level Uses Three's network
iD Mobile
Customer service
Monthly cost
£15/mth
 
5G data UnltdUnltd
Mins/texts Unlimited
Contract 1mth
'Free' Roaming 47 countries
Unltd minutes and texts
Signal level Uses Vodafone's network
TalkMobile
Customer service
Monthly cost
£16/mth

There are only four mobile networks in the UK

EE, O2, Three and Vodafone – all others piggyback on their signals. So if you like your current signal, use the links below or the filters in our tool to find the cheapest deal that uses your existing signal.

Want a new phone? Get it the cheapest way...

Get it on contract

Surprisingly, getting a phone on contract (phone + Sim) is often cheaper than buying it outright. If you want a new phone, we'll show you the top contract deals and whether it's cheaper to buy it outright.
Contract deals

Go refurbished

Refurbs offer big savings without compromising on quality. All models are tested, certified, and come with decent warranties so you're protected.
Refurbished deals

Buy it outright + cheap Sim

Buy your phone outright and avoid long-term contracts. Perfect if you don't need the very latest model and want the flexibility to choose any Sim deal.
Outright deals

Need help choosing?

If you're not set on a certain phone, we'll help match you with the top model for you and find the best deal.

Find the right phone on my budget

Tell us how much you want to spend, and we'll show you the best phone you can get for your money.

Find the right phone for my needs

Share your requirements, such as how you use your phone or how much data you need, and we'll recommend the right device for you.

Compares 1,000s of different combos

We'll find you the cheapest way to get a new phone or Sim including MSE Blagged deals

It can find the top phone for your requirements/budget

If you're not set on one model, we'll find you the best options

It can help analyse your data

Data is the real differentiator with deals, so it'll work out how much you need

It will filter out dud deals

We'll refine your results to exclude complex multi-redemption offers that most don't claim by default

Compares 50+ retailers & resellers, including

Mobile comparison tool FAQs

No, that's virtually impossible, but we do the best we can. We currently cover 50+ mobile providers, including all the major networks and retailers such as Amazon, Carphone Warehouse and John Lewis.

If we don't include a specific retailer in the tool, it's usually because they're so new/small that we're not sure how they perform in terms of customer service.

By default, we also don't show deals that require you to claim cashback at strict intervals throughout the contract, as most people don't bother or simply forget to claim these. They are referred to as 'multiple redemption' in the tool. Of course, if you do want to jump through these hoops to save even more, you can choose to show these using the filters in the results page.

Our tool looks at over 50 retailers and networks to help you find the best deals. You can view offers from all the big networks as well as smaller networks that piggyback off their signals, including: 1pMobile, Asda, Ecotalk, EE, Giffgaff, Honest Mobile, iD Mobile, Lebara, Mozillion, O2, Sky, Smarty, Spusu, Superdrug, Talk Home, TalkMobile, Tesco, The Phone Co-op, Three, Vodafone, Voxi.

If a link has an * by it, it is an affiliated link that helps MoneySavingExpert stay free to use, as it is tracked to us. If you go through it, it can sometimes result in a payment or benefit to the site. It's worth noting this means the third party used may be named on any credit agreements.

You shouldn't notice any difference and the link will never negatively impact the product. Plus the editorial line (the things we write) is NEVER impacted by these links. We aim to look at all available products. If it isn't possible to get an affiliate link for the top deal, it is still included in exactly the same way, just with a non-paying link. For more details, read How this site is financed.

The tool relies on providers/retailers telling us about their latest tariffs and products. We'll ask it for this twice a day, as prices don't tend to update much throughout the day. During busier periods, such as Black Friday and Christmas, prices can change multiple times a day, so we'll ramp up the amount of times we ask providers for pricing information.

Our small editorial team will try to ensure we display deals as soon as they come to market, including deals we've blagged as and when they become available.

We don't factor in deals from cashback sites as this cash is never guaranteed, and tracking problems occur for many people using cashback sites. If you do go via a cashback site, it's best to view any cashback as an added bonus. See our Top cashback sites guide for more.

The resellers we list are big, and generally have good feedback. The contract is still with the main network, so you get the same service, just via a cheaper source.

In the unlikely event a reseller went bust, don't worry – your contract will continue as normal as it's with the network (so there would be no change to your price or allowance of minutes, texts and data). The reseller is responsible for consumer rights on the handset though, so if there's a fault you'd need to rely on the manufacturer's warranty, or consumer rights via the payment card used.

How likely are you to lose or damage your phone? If it's a regular thing for you, then insurance is likely a good bet, as it costs less than repeatedly paying for a new phone. See top pick mobile insurance policies.

If you rarely lose or break it, rather than paying for insurance, you could simply put money aside each month into a top savings account. If you need to repair or replace your phone, the cash is there to pay for it. If you don't, the cash is yours.