Cheapest Three SIM only deals
Three has a variety of SIM only deals 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
24 months
DATA
3 GB
allowance
MINUTES
Unlimited
allowance
PRICE
£5
per month
Airtime plan will increase every April bill thereafter. Price will be £6 from Apr 2026. Airtime plan will increase every April bill thereafter. Price will be £7 from Apr 2027.
Mobile SIM Deal
12 months
DATA
25 GB
allowance
MINUTES
Unlimited
allowance
PRICE
£7
per month
Airtime plan will increase every April bill thereafter. Price will be £8.25 from Apr 2026.
Mobile SIM Deal
24 months
DATA
8 GB
allowance
MINUTES
Unlimited
allowance
PRICE
£7
per month
Airtime plan will increase every April bill thereafter. Price will be £8.25 from Apr 2026. Airtime plan will increase every April bill thereafter. Price will be £9.50 from Apr 2027.
Mobile SIM Deal
12 months
DATA
40 GB
allowance
MINUTES
Unlimited
allowance
PRICE
£8
per month
Airtime plan will increase every April bill thereafter. Price will be £9.25 from Apr 2026.
Mobile SIM Deal
24 months
DATA
30 GB
allowance
MINUTES
Unlimited
allowance
PRICE
£8
per month
Airtime plan will increase every April bill thereafter. Price will be £9.25 from Apr 2026. Airtime plan will increase every April bill thereafter. Price will be £10.50 from Apr 2027.
Mobile SIM Deal
24 months
DATA
25 GB
allowance
MINUTES
Unlimited
allowance
PRICE
£8
per month
Airtime plan will increase every April bill thereafter. Price will be £9.25 from Apr 2026. Airtime plan will increase every April bill thereafter. Price will be £10.50 from Apr 2027.
Mobile SIM Deal
12 months
DATA
60 GB
allowance
MINUTES
Unlimited
allowance
PRICE
£9
per month
Airtime plan will increase every April bill thereafter. Price will be £10.25 from Apr 2026.
Mobile SIM Deal
12 months
DATA
80 GB
allowance
MINUTES
Unlimited
allowance
PRICE
£10
per month
Airtime plan will increase every April bill thereafter. Price will be £11.25 from Apr 2026.
Mobile SIM Deal
24 months
DATA
60 GB
allowance
MINUTES
Unlimited
allowance
PRICE
£10
per month
Airtime plan will increase every April bill thereafter. Price will be £11.25 from Apr 2026. Airtime plan will increase every April bill thereafter. Price will be £12.50 from Apr 2027.
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