Unlimited Data SIM Only Deals (December 2025)

34 results in 0.006 seconds

Monthly cost

Any34
£5 or less0
£10 or less1
£15 or less5
£20 or less11
£25 or less23
£30 or less28
£30+9

Contract length

1 month16
12 months10
18 months1
24 months7
30 months0
36 months0

Minutes

Unlimited34

Texts

Unlimited34

5G only deals34

Exclusivei
Lebara SIM - 30 day rolling
More Close
Your monthly cost

Monthly cost for 3 months(from today)

£9.98

Monthly cost after 3 months(from 18 March 2026)

£24.95£14.97 price rise
Lebara benefits

Free EU roaming
Uses Vodafone's network
5G with all plans
No credit checks
MyLebara app
Phone and online support, 7 days per week
Wi-Fi and VoLTE calling
Lebara more information

Lebara coverage checker
Lebara fair usage
Lebara terms & conditions
Lebara traffic management
Lebara roaming information
Close
Unlimited data

First 3 months £9.98/month

After 3 months £24.95/month

Contract length No contract
No price rises
Unlimited minutes and texts
5G speeds
See deal

Sold by Lebara
Lycamobile SIM - 30 day rolling
More Close
Your monthly cost

Monthly cost for 1 month(from today)

£12.50

Monthly cost after 1 month(from 18 January 2026)

£25.00£12.50 price rise
Lycamobile benefits

Free EU roaming
Uses EE's network
5G with all plans
Wi-Fi and VoLTE calling
International calling
My Lyca Mobile App
Phone and online support
Lycamobile more information

Lycamobile coverage checker
Lycamobile fair usage
Lycamobile terms & conditions
Lycamobile traffic management
Lycamobile roaming information
Close
Unlimited data

First month £12.50/month

After 1 month £25.00/month

Contract length No contract
No price rises
Unlimited minutes and texts
eSIM available
5G speeds
See deal

Sold by Lycamobile
iD Mobile SIM - 12 month contract
More Close
Your monthly cost

Monthly cost for 12 months(no price rises)

£15.00

Your cost breakdown

Total contract length

12 months

Total cost of contract

£160.00

Cashback

£20.00 (automatic)

Effective monthly cost*

£13.33

*Effective monthly cost is the total cost of ownership divided by the total contract lengthTotal cost of ownership takes into account any cashback offers
iD Mobile benefits

5G with all plans
Free EU roaming
Data Rollover
Uses Three's network
Loyalty Perks
24/7 support
iD Mobile complaints iD Mobile received an average of 2 complaints per 100,000 customers between January 2025 and March 2025 in Ofcom's pay monthly mobile complaints
iD Mobile more information

iD Mobile coverage checker
iD Mobile fair usage
iD Mobile terms & conditions
iD Mobile traffic management
iD Mobile roaming information
Close
Unlimited data

Monthly cost £15.00/month

Contract length 12 months

Cashback £20.00 (automatic)

Total cost of ownership £160.00
No price rises
Unlimited minutes and texts
eSIM available
5G speeds
See deal

Sold by Mobiles.co.uk
giffgaff SIM - 18 month contract
More Close
Your monthly cost

Monthly cost for 18 months(no price rises)

£15.00

Your cost breakdown

Total contract length

18 months

Total cost of contract

£270.00

Effective monthly cost*

£15.00

*Effective monthly cost is the total cost of ownership divided by the total contract length
giffgaff benefits

Free EU roaming
Uses O2's network
giffgaff app
No credit check for SIM plans
No mid-contract price rises
Referral scheme
Wi-Fi & VoLTE calling
giffgaff more information

giffgaff coverage checker
giffgaff fair usage
giffgaff terms & conditions
giffgaff traffic management
giffgaff roaming information
Close
Unlimited data

Monthly cost £15.00/month

Contract length 18 months

Total cost of ownership £270.00
No price rises
Unlimited minutes and texts
eSIM available
5G speeds
See deal

Sold by giffgaff
iD Mobile SIM - 30 day rolling
More Close
Your monthly cost

Monthly cost for 1 month(no price rises)

£15.00
iD Mobile benefits

5G with all plans
Free EU roaming
Data Rollover
Uses Three's network
Loyalty Perks
24/7 support
iD Mobile complaints iD Mobile received an average of 2 complaints per 100,000 customers between January 2025 and March 2025 in Ofcom's pay monthly mobile complaints
iD Mobile more information

iD Mobile coverage checker
iD Mobile fair usage
iD Mobile terms & conditions
iD Mobile traffic management
iD Mobile roaming information
Close
Unlimited data

Monthly cost £15.00/month

Contract length No contract
No price rises
Unlimited minutes and texts
eSIM available
5G speeds
See deal

Choose a retailer

iD Mobile

Carphone Warehouse

Mobiles.co.uk

Available from 3 retailers
Exclusivei
Talkmobile SIM - 30 day rolling
More Close
Your monthly cost

Monthly cost for 1 month(no price rises)

£16.00
Talkmobile benefits

Uses Vodafone's and Three's network
Free EU roaming
Unlimited minutes & texts
5G with all plans
Wi-Fi and VoLTE calling
Phone and webchat support
Talkmobile more information

Talkmobile coverage checker
Talkmobile fair usage
Talkmobile terms & conditions
Talkmobile traffic management
Talkmobile roaming information
Close
Unlimited data

Monthly cost £16.00/month

Contract length No contract
No price rises
Unlimited minutes and texts
eSIM available
5G speeds
See deal

Sold by Talkmobile
Three SIM - 12 month contract
More Close
Your monthly cost

Monthly cost for 3 months(from 18 January 2026)

£17.00

Monthly cost for 9 months(from 18 April 2026)

£19.30£2.30 price rise

Average

£18.72

Your cost breakdown

Total contract length

12 months

Total cost of contract

£128.70

Cashback

£96.00 (redemption)

Effective monthly cost*

£10.73

*Effective monthly cost is the total cost of ownership divided by the total contract lengthTotal cost of ownership takes into account any cashback offers
Three benefits

5G with all plans
Also uses Vodafone's network
Wi-Fi and VoLTE calling
Three+ Rewards App
99%+ UK coverage
Three complaints Three received an average of 2 complaints per 100,000 customers between January 2025 and March 2025 in Ofcom's pay monthly mobile complaints
Three more information

Three coverage checker
Three fair usage
Three terms & conditions
Three traffic management
Three roaming information
Close
Unlimited data

First 3 months £17.00/month

4-12 months £19.30/month

Average £18.72/month

Contract length 12 months

Cashback £96.00 (redemption)

Total cost of ownership £128.70
Unlimited minutes and texts
eSIM available
5G speeds
See deal

Choose a retailer

Fonehouse

Metrofone

Available from 2 retailers
iD Mobile SIM - 24 month contract
More Close
Your monthly cost

Monthly cost for 24 months(no price rises)

£17.00

Your cost breakdown

Total contract length

24 months

Total cost of contract

£408.00

Effective monthly cost*

£17.00

*Effective monthly cost is the total cost of ownership divided by the total contract length
iD Mobile benefits

5G with all plans
Free EU roaming
Data Rollover
Uses Three's network
Loyalty Perks
24/7 support
iD Mobile complaints iD Mobile received an average of 2 complaints per 100,000 customers between January 2025 and March 2025 in Ofcom's pay monthly mobile complaints
iD Mobile more information

iD Mobile coverage checker
iD Mobile fair usage
iD Mobile terms & conditions
iD Mobile traffic management
iD Mobile roaming information
Close
Unlimited data

Monthly cost £17.00/month

Contract length 24 months

Total cost of ownership £408.00
No price rises
Unlimited minutes and texts
eSIM available
5G speeds
See deal

Choose a retailer

iD Mobile

Carphone Warehouse

Mobiles.co.uk

Available from 3 retailers
SMARTY SIM - 30 day rolling
More Close
Your monthly cost

Monthly cost for 1 month(no price rises)

£18.00
SMARTY benefits

Free EU roaming
No credit checks
Unlimited minutes & texts
Uses Three's network
99% UK outdoor population coverage
No annual price rises
Wi-Fi and VoLTE calling
SMARTY more information

SMARTY coverage checker
SMARTY fair usage
SMARTY terms & conditions
SMARTY traffic management
SMARTY roaming information
Close
Unlimited data

Monthly cost £18.00/month

Contract length No contract
No price rises
Unlimited minutes and texts
eSIM available
5G speeds
See deal

Sold by SMARTY
Asda Mobile SIM - 24 month contract
More Close
Your monthly cost

Monthly cost for 24 months(no price rises)

£19.00

Your cost breakdown

Total contract length

24 months

Total cost of contract

£456.00

Effective monthly cost*

£19.00

*Effective monthly cost is the total cost of ownership divided by the total contract length
Asda Mobile benefits

Free EU roaming
Wi-Fi and VoLTE calling
Uses Vodafone's network
Asda Rewards
Asda Mobile more information

Asda Mobile coverage checker
Asda Mobile fair usage
Asda Mobile terms & conditions
Asda Mobile traffic management
Asda Mobile roaming information
Close
Unlimited data

Monthly cost £19.00/month

Contract length 24 months

Total cost of ownership £456.00
No price rises
Unlimited minutes and texts
5G speeds
See deal

Sold by Asda Mobile
Exclusivei
Sky Mobile SIM - 12 month contract
More Close
Your monthly cost

Monthly cost for 12 months(no price rises)

£20.00

Your cost breakdown

Total contract length

12 months

Total cost of contract

£240.00

Effective monthly cost*

£20.00

*Effective monthly cost is the total cost of ownership divided by the total contract length
Sky Mobile benefits

Data rollover with Sky Piggybank
99% UK coverage
Unlimited streaming with Sky apps
Upgrade anytime with Sky Swap
5G with all plans
Uses O2's network
Sky Mobile complaints Sky Mobile received an average of 2 complaints per 100,000 customers between January 2025 and March 2025 in Ofcom's pay monthly mobile complaints
Sky Mobile more information

Sky Mobile coverage checker
Sky Mobile fair usage
Sky Mobile terms & conditions
Sky Mobile traffic management
Sky Mobile roaming information
Close
Unlimited data

Monthly cost £20.00/month

Contract length 12 months

Total cost of ownership £240.00
No price rises
Unlimited minutes and texts
eSIM available
5G speeds
See deal

Sold by Sky
Asda Mobile SIM - 12 month contract
More Close
Your monthly cost

Monthly cost for 12 months(no price rises)

£22.00

Your cost breakdown

Total contract length

12 months

Total cost of contract

£264.00

Effective monthly cost*

£22.00

*Effective monthly cost is the total cost of ownership divided by the total contract length
Asda Mobile benefits

Free EU roaming
Wi-Fi and VoLTE calling
Uses Vodafone's network
Asda Rewards
Asda Mobile more information

Asda Mobile coverage checker
Asda Mobile fair usage
Asda Mobile terms & conditions
Asda Mobile traffic management
Asda Mobile roaming information
Close
Unlimited data

Monthly cost £22.00/month

Contract length 12 months

Total cost of ownership £264.00
No price rises
Unlimited minutes and texts
5G speeds
See deal

Sold by Asda Mobile
Exclusivei
Three SIM - 24 month contract
More Close
Your monthly cost

Monthly cost for 3 months(from 18 January 2026)

£22.00

Monthly cost for 12 months(from 18 April 2026)

£24.30£2.30 price rise

Monthly cost for 9 months(from 18 April 2027)

£26.60£2.30 price rise

Average

£24.88

Your cost breakdown

Total contract length

24 months

Total cost of contract

£597.00

Effective monthly cost*

£24.88

*Effective monthly cost is the total cost of ownership divided by the total contract length
Three benefits

5G with all plans
Also uses Vodafone's network
Wi-Fi and VoLTE calling
Three+ Rewards App
99%+ UK coverage
Three complaints Three received an average of 2 complaints per 100,000 customers between January 2025 and March 2025 in Ofcom's pay monthly mobile complaints
Three more information

Three coverage checker
Three fair usage
Three terms & conditions
Three traffic management
Three roaming information
Close
Unlimited data

First 3 months £22.00/month

4-15 months £24.30/month

16-24 months £26.60/month

Average £24.88/month

Contract length 24 months

Total cost of ownership £597.00
Unlimited minutes and texts
eSIM available
5G speeds
See deal

Sold by Three
Asda Mobile SIM - 30 day rolling
More Close
Your monthly cost

Monthly cost for 1 month(no price rises)

£22.00
Asda Mobile benefits

Free EU roaming
Wi-Fi and VoLTE calling
Uses Vodafone's network
Asda Rewards
Asda Mobile more information

Asda Mobile coverage checker
Asda Mobile fair usage
Asda Mobile terms & conditions
Asda Mobile traffic management
Asda Mobile roaming information
Close
Unlimited data

Monthly cost £22.00/month

Contract length No contract
No price rises
Unlimited minutes and texts
5G speeds
See deal

Sold by Asda Mobile
Lebara SIM - 12 month contract
More Close
Your monthly cost

Monthly cost for 12 months(no price rises)

£22.50

Your cost breakdown

Total contract length

12 months

Total cost of contract

£270.00

Effective monthly cost*

£22.50

*Effective monthly cost is the total cost of ownership divided by the total contract length
Lebara benefits

Free EU roaming
Uses Vodafone's network
5G with all plans
No credit checks
MyLebara app
Phone and online support, 7 days per week
Wi-Fi and VoLTE calling
Lebara more information

Lebara coverage checker
Lebara fair usage
Lebara terms & conditions
Lebara traffic management
Lebara roaming information
Close
Unlimited data

Monthly cost £22.50/month

Contract length 12 months

Total cost of ownership £270.00
No price rises
Unlimited minutes and texts
5G speeds
See deal

Sold by Lebara

You've viewed 15 of 34 deals

Deals last updated: 6 hours 34 minutes ago

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