O2 24-month SIM only deals
O2 24-month SIM only deals give you a good discount for committing to a longer contract and already have a phone. Other detals include:
Our top pick
Mobile SIM Deal
24 months
DATA
150 GB
allowance
MINUTES
Unlimited
allowance
PRICE
£19.99
per month
Airtime plan will increase every April bill thereafter. Price will be £21.79 from Apr 2026. Airtime plan will increase every April bill thereafter. Price will be £23.59 from Apr 2027.
Mobile SIM Deal
24 months
DATA
Unlimited
allowance
MINUTES
Unlimited
allowance
PRICE
£24
per month
Airtime plan will increase every April bill thereafter. Price will be £25.80 from Apr 2026. Airtime plan will increase every April bill thereafter. Price will be £27.60 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 £19.79 from Apr 2026. Airtime plan will increase every April bill thereafter. Price will be £21.59 from Apr 2027.
Mobile SIM Deal
24 months
DATA
40 GB
allowance
MINUTES
Unlimited
allowance
PRICE
£30.49
per month
Airtime plan will increase every April bill thereafter. Price will be £32.29 from Apr 2026. Airtime plan will increase every April bill thereafter. Price will be £34.09 from Apr 2027.
Mobile SIM Deal
24 months
DATA
10 GB
allowance
MINUTES
Unlimited
allowance
PRICE
£26.49
per month
Airtime plan will increase every April bill thereafter. Price will be £28.29 from Apr 2026. Airtime plan will increase every April bill thereafter. Price will be £30.09 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 £24.80 from Apr 2026. Airtime plan will increase every April bill thereafter. Price will be £26.60 from Apr 2027.
Mobile SIM Deal
24 months
DATA
250 GB
allowance
MINUTES
Unlimited
allowance
PRICE
£27
per month
Airtime plan will increase every April bill thereafter. Price will be £28.80 from Apr 2026. Airtime plan will increase every April bill thereafter. Price will be £30.60 from Apr 2027.
Mobile SIM Deal
24 months
DATA
Unlimited
allowance
MINUTES
Unlimited
allowance
PRICE
£33.99
per month
Airtime plan will increase every April bill thereafter. Price will be £35.79 from Apr 2026. Airtime plan will increase every April bill thereafter. Price will be £37.59 from Apr 2027.
Mobile SIM Deal
24 months
DATA
Unlimited
allowance
MINUTES
Unlimited
allowance
PRICE
£42.49
per month
Airtime plan will increase every April bill thereafter. Price will be £44.29 from Apr 2026. Airtime plan will increase every April bill thereafter. Price will be £46.09 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 £25.80 from Apr 2026. Airtime plan will increase every April bill thereafter. Price will be £27.60 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 £23.79 from Apr 2026. Airtime plan will increase every April bill thereafter. Price will be £25.59 from Apr 2027.
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