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O2 12-month SIM only deals

O2 12-month SIM only deals are a great way to use O2 if you don't need a new phone. If you need something different, O2 are have a range of other SIM only deals available:

O2 30-day SIM only dealsO2 24-month SIM only dealsO2 unlimited data SIMsCheapest O2 SIM only dealsO2 Mobile Broadband SIM onlyO2 Tablet SIM onlyO2 5G SIMs
Our top pick
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Unlimited speed
5G+

SIM Only Plus Unlimited

Data
Unlimited
(Unlimited speed included)
Allowances
Unlimited minutes
Unlimited texts
Contract
12 months
Total cost: £443.88
Price
£36.99per month
  • Price becomes £39.49 on 1 April 2026
Free Disney+, Amazon Music, Prime, Audible, Cafeyn or McAfee Subscription (6 months)
Get deal
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Unlimited speed
5G+

SIM Only Classic

Data
Unlimited
(Unlimited speed included)
Allowances
Unlimited minutes
Unlimited texts
Contract
12 months
Total cost: £420
Price
£35per month
  • Price becomes £37.50 on 1 April 2026
Get deal

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Unlimited speed
5G+

SIM Only Plus 150GB

Data
150 GB
(Unlimited speed included)
Allowances
Unlimited minutes
Unlimited texts
Contract
12 months
Total cost: £347.88
Price
£28.99per month
  • Price becomes £31.49 on 1 April 2026
Get deal
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Unlimited speed
5G+

SIM Only Classic

Data
3 GB
(Unlimited speed included)
Allowances
Unlimited minutes
Unlimited texts
Contract
12 months
Total cost: £228
Price
£19per month
  • Price becomes £21.50 on 1 April 2026
Get deal
logo
Unlimited speed
5G+

SIM Only Classic

Data
100 GB
(Unlimited speed included)
Allowances
Unlimited minutes
Unlimited texts
Contract
12 months
Total cost: £324
Price
£27per month
  • Price becomes £29.50 on 1 April 2026
Get deal
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Unlimited speed
5G+

SIM Only Plus 40GB

Data
40 GB
(Unlimited speed included)
Allowances
Unlimited minutes
Unlimited texts
Contract
12 months
Total cost: £299.88
Price
£24.99per month
  • Price becomes £27.49 on 1 April 2026
Get deal
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Unlimited speed
5G+

SIM Only Classic

Data
20 GB
(Unlimited speed included)
Allowances
Unlimited minutes
Unlimited texts
Contract
12 months
Total cost: £276
Price
£23per month
  • Price becomes £25.50 on 1 April 2026
Get deal
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Unlimited speed
5G+

SIM Only Plus 10GB

Data
10 GB
(Unlimited speed included)
Allowances
Unlimited minutes
Unlimited texts
Contract
12 months
Total cost: £251.88
Price
£20.99per month
  • Price becomes £23.49 on 1 April 2026
Get deal
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Unlimited speed
5G+

SIM Only Ultimate 150GB

Data
150 GB
(Unlimited speed included)
Allowances
Unlimited minutes
Unlimited texts
Contract
12 months
Total cost: £449.88
Price
£37.49per month
  • Price becomes £39.99 on 1 April 2026
Get deal
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Unlimited speed
5G+

SIM Only Ultimate 10GB

Data
10 GB
(Unlimited speed included)
Allowances
Unlimited minutes
Unlimited texts
Contract
12 months
Total cost: £353.88
Price
£29.49per month
  • Price becomes £31.99 on 1 April 2026
Get deal
logo
Unlimited speed
5G+

SIM Only Ultimate 40GB

Data
40 GB
(Unlimited speed included)
Allowances
Unlimited minutes
Unlimited texts
Contract
12 months
Total cost: £401.88
Price
£33.49per month
  • Price becomes £35.99 on 1 April 2026
Get deal

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