Unlimited Data SIM Only Deals (August 2025)

18 results in 0.005 seconds

Monthly cost

Any18
£5 or less0
£10 or less0
£15 or less3
£20 or less8
£25 or less11
£30 or less16
£30+5

Total cost

Any18
£100 or less7
£150 or less9
£200 or less9
£250 or less11
£300 or less12
£500 or less15

Contract length

1 month7
12 months6
18 months0
24 months5
30 months0
36 months0

Minutes

Unlimited18

Texts

Unlimited18

5G only deals18

iD Mobile SIM
Unlimited data
- Unlimited minutes
- Unlimited texts
Contract months:

1

Total ownership:

£15.00

Upfront:

FREE

Monthly:

£15.00
See deal
Choose a retailer

Sold by:
iD Mobile

Sold by:
Carphone Warehouse

Sold by:
Mobiles.co.uk

Available from 3 retailers
See deal
Choose a retailer

Sold by:
iD Mobile

Sold by:
Carphone Warehouse

Sold by:
Mobiles.co.uk
Available from 3 retailers
iD Mobile SIM

Unlimited data Unlimited mins + texts
Contract months:

1

Total ownership:

£15.00

Upfront:

FREE

Monthly:

£15.00
Save
See deal
Choose a retailer

Sold by:
iD Mobile

Sold by:
Carphone Warehouse

Sold by:
Mobiles.co.uk
Available from 3 retailers
iD Mobile SIM
- £60.00 cashback by redemption
Unlimited data
- Unlimited minutes
- Unlimited texts
Contract months:

12

Total ownership:

£120.00

Upfront:

FREE

Monthly:

£15.00

See deal

Sold by Mobiles.co.uk

See deal

Sold by Mobiles.co.uk
iD Mobile SIM

Unlimited data Unlimited mins + texts
- £60.00 cashback by redemption
Contract months:

12

Total ownership:

£120.00

Upfront:

FREE

Monthly:

£15.00

Save

See deal

Sold by Mobiles.co.uk
iD Mobile SIM
- £120.00 cashback by redemption
Unlimited data
- Unlimited minutes
- Unlimited texts
Contract months:

24

Total ownership:

£240.00

Upfront:

FREE

Monthly:

£15.00

See deal

Sold by Mobiles.co.uk

See deal

Sold by Mobiles.co.uk
iD Mobile SIM

Unlimited data Unlimited mins + texts
- £120.00 cashback by redemption
Contract months:

24

Total ownership:

£240.00

Upfront:

FREE

Monthly:

£15.00

Save

See deal

Sold by Mobiles.co.uk
CompareDial Exclusive
Talkmobile SIM
Unlimited data
- Unlimited minutes
- Unlimited texts
Contract months:

1

Total ownership:

£16.95

Upfront:

FREE

Monthly:

£16.95

See deal

Sold by Talkmobile

See deal

Sold by Talkmobile
Talkmobile SIM

Unlimited data Unlimited mins + texts

Contract months:

1

Total ownership:

£16.95

Upfront:

FREE

Monthly:

£16.95

Save

See deal

Sold by Talkmobile
Three SIM
- £96.00 cashback by redemption
Unlimited data
- Unlimited minutes
- Unlimited texts
Contract months:

12

Total ownership:

£108.00

Upfront:

FREE

Monthly:

£17.00
See deal
Choose a retailer

Sold by:
Fonehouse

Sold by:
Metrofone

Available from 2 retailers
See deal
Choose a retailer

Sold by:
Fonehouse

Sold by:
Metrofone
Available from 2 retailers
Three SIM

Unlimited data Unlimited mins + texts
- £96.00 cashback by redemption
Contract months:

12

Total ownership:

£108.00

Upfront:

FREE

Monthly:

£17.00
Save
See deal
Choose a retailer

Sold by:
Fonehouse

Sold by:
Metrofone
Available from 2 retailers
Asda Mobile SIM
Unlimited data
- Unlimited minutes
- Unlimited texts
Contract months:

24

Total ownership:

£475.00

Upfront:

£19.00

Monthly:

£19.00

See deal

Sold by Asda Mobile

See deal

Sold by Asda Mobile
Asda Mobile SIM

Unlimited data Unlimited mins + texts

Contract months:

24

Total ownership:

£475.00

Upfront:

£19.00

Monthly:

£19.00

Save

See deal

Sold by Asda Mobile
SMARTY SIM
Unlimited data
- Unlimited minutes
- Unlimited texts
Contract months:

1

Total ownership:

£20.00

Upfront:

FREE

Monthly:

£20.00

See deal

Sold by SMARTY

See deal

Sold by SMARTY
SMARTY SIM

Unlimited data Unlimited mins + texts

Contract months:

1

Total ownership:

£20.00

Upfront:

FREE

Monthly:

£20.00

Save

See deal

Sold by SMARTY
CompareDial Exclusive
Sky Mobile SIM
Unlimited data
- Unlimited minutes
- Unlimited texts
Contract months:

12

Total ownership:

£240.00

Upfront:

FREE

Monthly:

£20.00

See deal

Sold by Sky

See deal

Sold by Sky
Sky Mobile SIM

Unlimited data Unlimited mins + texts

Contract months:

12

Total ownership:

£240.00

Upfront:

FREE

Monthly:

£20.00

Save

See deal

Sold by Sky
Asda Mobile SIM
Unlimited data
- Unlimited minutes
- Unlimited texts
Contract months:

1

Total ownership:

£44.00

Upfront:

£22.00

Monthly:

£22.00

See deal

Sold by Asda Mobile

See deal

Sold by Asda Mobile
Asda Mobile SIM

Unlimited data Unlimited mins + texts

Contract months:

1

Total ownership:

£44.00

Upfront:

£22.00

Monthly:

£22.00

Save

See deal

Sold by Asda Mobile
Asda Mobile SIM
Unlimited data
- Unlimited minutes
- Unlimited texts
Contract months:

12

Total ownership:

£286.00

Upfront:

£22.00

Monthly:

£22.00

See deal

Sold by Asda Mobile

See deal

Sold by Asda Mobile
Asda Mobile SIM

Unlimited data Unlimited mins + texts

Contract months:

12

Total ownership:

£286.00

Upfront:

£22.00

Monthly:

£22.00

Save

See deal

Sold by Asda Mobile
Tesco Mobile SIM
Unlimited data
- Unlimited minutes
- Unlimited texts
Contract months:

24

Total ownership:

£600.00

Upfront:

FREE

Monthly:

£25.00

See deal

Sold by Tesco Mobile

See deal

Sold by Tesco Mobile
Tesco Mobile SIM

Unlimited data Unlimited mins + texts

Contract months:

24

Total ownership:

£600.00

Upfront:

FREE

Monthly:

£25.00

Save

See deal

Sold by Tesco Mobile
CompareDial Exclusive
Three SIM
Unlimited data
- Unlimited minutes
- Unlimited texts
Contract months:

24

Total ownership:

£648.00

Upfront:

FREE

Monthly:

£27.00

See deal

Sold by Three

See deal

Sold by Three
Three SIM

Unlimited data Unlimited mins + texts

Contract months:

24

Total ownership:

£648.00

Upfront:

FREE

Monthly:

£27.00

Save

See deal

Sold by Three
Vodafone SIM
Unlimited data
- Unlimited minutes
- Unlimited texts
Contract months:

24

Total ownership:

£648.00

Upfront:

FREE

Monthly:

£27.00

See deal

Sold by Vodafone

See deal

Sold by Vodafone
Vodafone SIM

Unlimited data Unlimited mins + texts

Contract months:

24

Total ownership:

£648.00

Upfront:

FREE

Monthly:

£27.00

Save

See deal

Sold by Vodafone
VOXI SIM
Unlimited data
- Unlimited minutes
- Unlimited texts
Contract months:

1

Total ownership:

£30.00

Upfront:

FREE

Monthly:

£30.00
See deal
Choose a retailer

Sold by:
Fonehouse

Sold by:
Metrofone

Available from 2 retailers
See deal
Choose a retailer

Sold by:
Fonehouse

Sold by:
Metrofone
Available from 2 retailers
VOXI SIM

Unlimited data Unlimited mins + texts
Contract months:

1

Total ownership:

£30.00

Upfront:

FREE

Monthly:

£30.00
Save
See deal
Choose a retailer

Sold by:
Fonehouse

Sold by:
Metrofone
Available from 2 retailers
Three SIM
Unlimited data
- Unlimited minutes
- Unlimited texts
Contract months:

1

Total ownership:

£30.00

Upfront:

FREE

Monthly:

£30.00
See deal
Choose a retailer

Sold by:
Fonehouse

Sold by:
Metrofone

Available from 2 retailers
See deal
Choose a retailer

Sold by:
Fonehouse

Sold by:
Metrofone
Available from 2 retailers
Three SIM

Unlimited data Unlimited mins + texts
Contract months:

1

Total ownership:

£30.00

Upfront:

FREE

Monthly:

£30.00
Save
See deal
Choose a retailer

Sold by:
Fonehouse

Sold by:
Metrofone
Available from 2 retailers

You've viewed 15 of 18 deals

Have we been helpful?

Review us on

1 star
2 star
3 star
4 star
5 star

Deals last updated: 3 hours 16 minutes ago

We (CompareDial Ltd) are an independent company. We are not owned by, nor have we received investment from, a provider, network or retailer. Our algorithm is unbiased and does not favour providers, networks or retailers.
We may earn a commission whenever you click on a link listed through our website and continue to make a purchase. Our algorithm for fetching and showing results is not influenced by the amount of commission we receive, nor is our editorial content.
For more information about CompareDial, please see our about page.
An explanation on how we calculate costs can be found here.
Prices shown can change at any time and may be different elsewhere, such as on external websites and competing comparison tools.
For information about our sorting algorithm, click the 'i' (information) button next to the sort options on this page.
All stated monthly costs assume you will pay by direct debit. A provider may charge more if you choose an alternative payment method.
Missed monthly payments may incur a penalty from your provider. Your credit score may also be affected.
If you go over your stated allowance or use a service not included within your allowance, your provider may charge you at an additional out of plan rate.
We aim to show most costs associated with a contract, however we may not show more granular costs, such as international rates, roaming rates and some out of plan rates.
Cashback is shown whenever it is available. Cashback is paid by the provider. Redemption cashback must be manually claimed, usually in installments.
All prices shown include VAT.
If you spot a mistake on our website, or think something is inaccurate, please contact us so we can fix it as soon as possible.
If you have a complaint about us (CompareDial), please see our complaints page for contact information.
Contracts may be subject to fair usage policies and traffic management policies. Where possible, we will provide links to the provider’s terms and conditions for acceptable use.
We do not show legacy tariffs, deals exclusively for existing customers, upgrade deals or deals included with other bundles. We only show contract deals that are available for all customers.
For phone and SIM only deals, we only show contracts that are 30 days / 1 month or longer.
Prices shown can change at any time, and may differ on a provider’s own website or app.
Providers can increase the cost of your contract in line with RPI (inflation). If you believe an increase is either excessive, unfair or wasn't stated clearly in your contract, you may be able to exit your contract without penalty. For more information, see Ofcom’s guide on unexpected mid-contract price rises. You can also make a complaint through Ofcom.
We try to include as many deals as possible, however our results do not represent a complete overview of the market. If you’re a retailer or network and you wish to be included in our results, please contact us.
For more advice related to consumer phones and contracts, please visit Ofcom consumer guides.
Ofcom runs a voluntary accreditation scheme for digital comparison tools (DCTs) for telephone, broadband and pay-TV, and has confirmed that this DCT meets the criteria for accreditation. For further details about the scheme, including the criteria that DCTs must meet, visit the price comparison page on the Ofcom website.