Three unlimited data sim only deals
Three has a variety of unlimited data SIMs available on different contract lengths. If you need something different, Three are have a range of other SIM only deals available:
Our top pick
Mobile SIM Deal
1 month
DATA
Unlimited
allowance
MINUTES
Unlimited
allowance
PRICE
£16
per month
Unlimited voice minutes
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Mobile SIM Deal
12 months
DATA
Unlimited
allowance
MINUTES
Unlimited
allowance
PRICE
£18
per month
Airtime plan will increase every April bill thereafter. Price will be £19.50 from Apr 2026.
Mobile SIM Deal
12 months
DATA
Unlimited
allowance
MINUTES
Unlimited
allowance
PRICE
£18
per month
Airtime plan will increase every April bill thereafter. Price will be £19.50 from Apr 2026.
Mobile SIM Deal
24 months
DATA
Unlimited
allowance
MINUTES
Unlimited
allowance
PRICE
£22
per month
Airtime plan will increase every April bill thereafter. Price will be £23.50 from Apr 2026. Airtime plan will increase every April bill thereafter. Price will be £25 from Apr 2027.
Mobile SIM Deal
24 months
DATA
Unlimited
allowance
MINUTES
Unlimited
allowance
PRICE
£22
per month
Airtime plan will increase every April bill thereafter. Price will be £23.50 from Apr 2026. Airtime plan will increase every April bill thereafter. Price will be £25 from Apr 2027.
Mobile SIM Deal
12 months
DATA
Unlimited
allowance
MINUTES
Unlimited
allowance
PRICE
£23
per month
Airtime plan will increase every April bill thereafter. Price will be £24.50 from Apr 2026.
Mobile SIM Deal
12 months
DATA
Unlimited
allowance
MINUTES
Unlimited
allowance
PRICE
£23
per month
Airtime plan will increase every April bill thereafter. Price will be £24.50 from Apr 2026.
Mobile SIM Deal
24 months
DATA
Unlimited
allowance
MINUTES
Unlimited
allowance
PRICE
£28
per month
Airtime plan will increase every April bill thereafter. Price will be £29.50 from Apr 2026. Airtime plan will increase every April bill thereafter. Price will be £31 from Apr 2027.
Mobile SIM Deal
24 months
DATA
Unlimited
allowance
MINUTES
Unlimited
allowance
PRICE
£28
per month
Airtime plan will increase every April bill thereafter. Price will be £29.50 from Apr 2026. Airtime plan will increase every April bill thereafter. Price will be £31 from Apr 2027.
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