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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:

O2 30-day SIM only dealsO2 12-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 Ultimate 3GB

Data
3 GB
(Unlimited speed included)
Allowances
Unlimited minutes
Unlimited texts
Contract
24 months
Total cost: £599.76
Price
£24.99per month
  • Price becomes £27.49 on 1 April 2027
  • Price becomes £29.99 on 1 April 2028
Boosted Broadband Speeds for Virgin Media Customers
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Unlimited speed
5G+

SIM Only Ultimate 20GB

Data
20 GB
(Unlimited speed included)
Allowances
Unlimited minutes
Unlimited texts
Contract
24 months
Total cost: £671.76
Price
£27.99per month
  • Price becomes £30.49 on 1 April 2027
  • Price becomes £32.99 on 1 April 2028
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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 2027
  • Price becomes £37 on 1 April 2028
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Unlimited speed
5G+

SIM Only Ultimate 100GB

Data
100 GB
(Unlimited speed included)
Allowances
Unlimited minutes
Unlimited texts
Contract
24 months
Total cost: £767.76
Price
£31.99per month
  • Price becomes £34.49 on 1 April 2027
  • Price becomes £36.99 on 1 April 2028
Get deal
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Unlimited speed
5G+

SIM Only Classic

Data
100 GB
(Unlimited speed included)
Allowances
Unlimited minutes
Unlimited texts
Contract
24 months
Total cost: £600
Price
£25per month
  • Price becomes £27.50 on 1 April 2027
  • Price becomes £30 on 1 April 2028
Get deal
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Unlimited speed
5G+

SIM Only Ultimate Unlimited

Data
Unlimited
(Unlimited speed included)
Allowances
Unlimited minutes
Unlimited texts
Contract
24 months
Total cost: £935.76
Price
£38.99per month
  • Price becomes £41.49 on 1 April 2027
  • Price becomes £43.99 on 1 April 2028
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Unlimited speed
5G+

SIM Only Classic

Data
20 GB
(Unlimited speed included)
Allowances
Unlimited minutes
Unlimited texts
Contract
24 months
Total cost: £504
Price
£21per month
  • Price becomes £23.50 on 1 April 2027
  • Price becomes £26 on 1 April 2028
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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: £576
Price
£24per month
  • Price becomes £26.50 on 1 April 2027
  • Price becomes £29 on 1 April 2028
Get deal
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Unlimited speed
5G+

SIM Only Plus 20GB

Data
20 GB
(Unlimited speed included)
Allowances
Unlimited minutes
Unlimited texts
Contract
24 months
Total cost: £551.76
Price
£22.99per month
  • Price becomes £25.49 on 1 April 2027
  • Price becomes £27.99 on 1 April 2028
Get deal
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Unlimited speed
5G+

SIM Only Plus Unlimited

Data
Unlimited
(Unlimited speed included)
Allowances
Unlimited minutes
Unlimited texts
Contract
24 months
Total cost: £815.76
Price
£33.99per month
  • Price becomes £36.49 on 1 April 2027
  • Price becomes £38.99 on 1 April 2028
Get deal
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Unlimited speed
5G+

SIM Only Plus 100GB

Data
100 GB
(Unlimited speed included)
Allowances
Unlimited minutes
Unlimited texts
Contract
24 months
Total cost: £647.76
Price
£26.99per month
  • Price becomes £29.49 on 1 April 2027
  • Price becomes £31.99 on 1 April 2028
Get deal

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