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O2 5G SIM only deals

O2 5G SIM only deals are a great way to experience its 5G network. If you need something different, O2 are have a range of other SIM only deals available:

O2 30-day SIM only dealsO2 12-month SIM only dealsO2 24-month SIM only dealsO2 unlimited data SIMsCheapest O2 SIM only dealsO2 Mobile Broadband SIM onlyO2 Tablet SIM only
Our top pick
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Unlimited speed
5G+

SIM Only Plus 10GB

Data
10 GB
(Unlimited speed included)
Allowances
Unlimited minutes
Unlimited texts
Contract
24 months
Total cost: £431.76
Price
£17.99per month
  • Price becomes £20.49 on 1 April 2026
  • Price becomes £22.99 on 1 April 2027
Free Disney+, Amazon Music, Prime, Audible, Cafeyn or McAfee Subscription (6 months)
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Unlimited speed
5G+

SIM Only Classic

Data
Unlimited
(Unlimited speed included)
Allowances
Unlimited minutes
Unlimited texts
Contract
24 months
Total cost: £768
Price
£32per month
  • Price becomes £34.50 on 1 April 2026
  • Price becomes £37 on 1 April 2027
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logo
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 Classic

Data
40 GB
(Unlimited speed included)
Allowances
Unlimited minutes
Unlimited texts
Contract
1 month
Price
£28per month
  • Price becomes £30.50 on 1 April 2026
Get deal
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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
Get deal
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Unlimited speed
5G+

SIM Only Classic

Data
20 GB
(Unlimited speed included)
Allowances
Unlimited minutes
Unlimited texts
Contract
1 month
Price
£26per month
  • Price becomes £28.50 on 1 April 2026
Get deal
logo
Unlimited speed
5G+

SIM Only Classic

Data
Unlimited
(Unlimited speed included)
Allowances
Unlimited minutes
Unlimited texts
Contract
1 month
Price
£38per month
  • Price becomes £40.50 on 1 April 2026
Get deal
logo
Unlimited speed
5G+

SIM Only Classic

Data
20 GB
(Unlimited speed included)
Allowances
Unlimited minutes
Unlimited texts
Contract
24 months
Total cost: £480
Price
£20per month
  • Price becomes £22.50 on 1 April 2026
  • Price becomes £25 on 1 April 2027
Get deal
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Unlimited speed
5G+

SIM Only Classic

Data
250 GB
(Unlimited speed included)
Allowances
Unlimited minutes
Unlimited texts
Contract
24 months
Total cost: £648
Price
£27per month
  • Price becomes £29.50 on 1 April 2026
  • Price becomes £32 on 1 April 2027
Get deal
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Unlimited speed
5G+

SIM Only Classic

Data
50 GB
(Unlimited speed included)
Allowances
Unlimited minutes
Unlimited texts
Contract
24 months
Total cost: £552
Price
£23per month
  • Price becomes £25.50 on 1 April 2026
  • Price becomes £28 on 1 April 2027
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
24 months
Total cost: £623.76
Price
£25.99per month
  • Price becomes £28.49 on 1 April 2026
  • Price becomes £30.99 on 1 April 2027
Get deal

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