Unlimited data SIM only deals

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Sorted by: Bestselling

List of SIM Only deals

Deals not available as upgrades for existing customers

Exclusive
Lebara Mobile SIM Deal
Uses Vodafone's Network
Unlimited5G data
£9.98 a monthfor 3 months, then £24.95Price details
1 month contract
Roam up to 30GB in 37 destinations
No annual price rise
No Credit Check
Best Mobile Network for Roaming
iD Mobile SIM Deal
Uses Three Mobile's Network
Unlimited5G data
£15.00 a month
1 month contract
Roam up to 30GB in 50 destinations
No annual price rise
2 months Free Apple Fitness+ Music and Arcade
Talkmobile SIM Deal
Uses Vodafone's Network
Unlimited5G data
£16.00 a month
1 month contract
No annual price rise
iD Mobile SIM Deal
Uses Three Mobile's Network
Unlimited5G data
£8.00 a monthfor 3 months, then £16.00Price details
12 month contract
Roam up to 30GB in 50 destinations
No annual price rise
2 months Free Apple Fitness+ Music and Arcade
SMARTY SIM Deal
Uses Three Mobile's Network
Unlimited5G data
£18.00 a month
1 month contract
Roam up to 12GB in 45 destinations
No annual price rise
No Credit Check
Three Mobile SIM Deal
Uses Three Mobile's Network
Unlimited5G data
£18.00 a monthuntil April 2027then price rises every April in contract by £2.30Price details
12 month contract
VOXI SIM Deal
Uses Vodafone's Network
Unlimited5G data
£20.00 a month
No contract
Roam up to 20GB in 4 destinations
No annual price rise
Unlimited Social Media Music and Video
Best SIM Only Mobile Network
iD Mobile SIM Deal
Uses Three Mobile's Network
Unlimited5G data
£16.00 a month
1 month contract
Roam up to 30GB in 50 destinations
No annual price rise
2 months Free Apple Fitness+ Music and Arcade
Sky Mobile SIM Deal
Uses O2's Network
Unlimited5G data
£20.00 a monthMonthly cost may rise in contract
12 month contract
Data rollover
Asda Mobile SIM Deal
Uses Vodafone's Network
Unlimited5G data
£19.00 a month
24 month contract
Roam up to 5GB in 45 destinations

Can't find what you're looking for?

Previously, most mobile networks raised contract prices in line with inflation. From January 2025, however, Ofcom will ban inflation-based price hikes on new contracts, requiring future increases to be fixed and clearly stated upfront.

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