Cheapest O2 SIM only deals
O2 has a variety of SIM only deals available on different contract lengths. If you need something different, O2 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
£16
per month
Airtime plan will increase every April bill thereafter. Price will be £18.50 from Apr 2026. Airtime plan will increase every April bill thereafter. Price will be £21 from Apr 2027.
Mobile SIM Deal
24 months
DATA
10 GB
allowance
MINUTES
Unlimited
allowance
PRICE
£17.99
per month
Airtime plan will increase every April bill thereafter. Price will be £20.49 from Apr 2026. Airtime plan will increase every April bill thereafter. Price will be £22.99 from Apr 2027.
UNLOCK EXCLUSIVE SAVINGS & DEALS
Join our savvy community and get insider access to the best broadband, power, mobile, and shopping deals – plus expert tips and money-saving guides delivered straight to your inbox.
Mobile SIM Deal
12 months
DATA
3 GB
allowance
MINUTES
Unlimited
allowance
PRICE
£19
per month
Airtime plan will increase every April bill thereafter. Price will be £21.50 from Apr 2026. Airtime plan will increase every April bill thereafter. Price will be £24 from Apr 2027.
Mobile SIM Deal
24 months
DATA
20 GB
allowance
MINUTES
Unlimited
allowance
PRICE
£20
per month
Airtime plan will increase every April bill thereafter. Price will be £22.50 from Apr 2026. Airtime plan will increase every April bill thereafter. Price will be £25 from Apr 2027.
Mobile SIM Deal
12 months
DATA
10 GB
allowance
MINUTES
Unlimited
allowance
PRICE
£20.99
per month
Airtime plan will increase every April bill thereafter. Price will be £23.49 from Apr 2026. Airtime plan will increase every April bill thereafter. Price will be £25.99 from Apr 2027.
Mobile SIM Deal
24 months
DATA
40 GB
allowance
MINUTES
Unlimited
allowance
PRICE
£21.99
per month
Airtime plan will increase every April bill thereafter. Price will be £24.49 from Apr 2026. Airtime plan will increase every April bill thereafter. Price will be £26.99 from Apr 2027.
Mobile SIM Deal
1 month
DATA
3 GB
allowance
MINUTES
Unlimited
allowance
PRICE
£22
per month
Airtime plan will increase every April bill thereafter. Price will be £24.50 from Apr 2026. Airtime plan will increase every April bill thereafter. Price will be £27 from Apr 2027.
Mobile SIM Deal
24 months
DATA
50 GB
allowance
MINUTES
Unlimited
allowance
PRICE
£23
per month
Airtime plan will increase every April bill thereafter. Price will be £25.50 from Apr 2026. Airtime plan will increase every April bill thereafter. Price will be £28 from Apr 2027.
Mobile SIM Deal
12 months
DATA
20 GB
allowance
MINUTES
Unlimited
allowance
PRICE
£23
per month
Airtime plan will increase every April bill thereafter. Price will be £25.50 from Apr 2026. Airtime plan will increase every April bill thereafter. Price will be £28 from Apr 2027.
Mobile SIM Deal
1 month
DATA
10 GB
allowance
MINUTES
Unlimited
allowance
PRICE
£24
per month
Airtime plan will increase every April bill thereafter. Price will be £26.50 from Apr 2026. Airtime plan will increase every April bill thereafter. Price will be £29 from Apr 2027.
Mobile SIM Deal
24 months
DATA
100 GB
allowance
MINUTES
Unlimited
allowance
PRICE
£24
per month
Airtime plan will increase every April bill thereafter. Price will be £26.50 from Apr 2026. Airtime plan will increase every April bill thereafter. Price will be £29 from Apr 2027.
Showing 1 to 10 of 32 results
