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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:

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

SIM Only Classic

Data
20 GB
(Unlimited speed included)
Allowances
Unlimited minutes
Unlimited texts
Contract
12 months
Total cost: £90
Price
£7.50per month
  • Price becomes £10 on 1 April 2026
Boosted Broadband Speeds for Virgin Media Customers
Get deal
logo
Unlimited speed
5G+

SIM Only Classic

Data
40 GB
(Unlimited speed included)
Allowances
Unlimited minutes
Unlimited texts
Contract
12 months
Total cost: £96
Price
£8per month
  • Price becomes £10.50 on 1 April 2026
Get deal

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logo
Unlimited speed
5G+

SIM Only Classic

Data
80 GB
(Unlimited speed included)
Allowances
Unlimited minutes
Unlimited texts
Contract
12 months
Total cost: £114
Price
£9.50per month
  • Price becomes £12 on 1 April 2026
Get deal
logo
Unlimited speed
5G+

Standard 30 day SIMO

Data
10 GB
(Unlimited speed included)
Allowances
Unlimited minutes
Unlimited texts
Contract
1 month
Price
£10per month
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: £120
Price
£10per month
  • Price becomes £12.50 on 1 April 2026
Get deal
logo
Unlimited speed
5G+

Standard 30 day SIMO

Data
30 GB
(Unlimited speed included)
Allowances
Unlimited minutes
Unlimited texts
Contract
1 month
Price
£15per month
Get deal
logo
Unlimited speed
5G+

SIM Only Classic

Data
30 GB
(Unlimited speed included)
Allowances
Unlimited minutes
Unlimited texts
Contract
24 months
Total cost: £360
Price
£15per month
  • Price becomes £17.50 on 1 April 2026
  • Price becomes £20 on 1 April 2027
Get deal
logo
Unlimited speed
5G+

SIM Only Classic

Data
250 GB
(Unlimited speed included)
Allowances
Unlimited minutes
Unlimited texts
Contract
12 months
Total cost: £180
Price
£15per month
  • Price becomes £17.50 on 1 April 2026
Get deal
logo
Unlimited speed
5G+

SIM Only Classic

Data
3 GB
(Unlimited speed included)
Allowances
Unlimited minutes
Unlimited texts
Contract
24 months
Total cost: £384
Price
£16per month
  • Price becomes £18.50 on 1 April 2026
  • Price becomes £21 on 1 April 2027
Get deal
logo
Unlimited speed
5G+

SIM Only Classic

Data
300 GB
(Unlimited speed included)
Allowances
Unlimited minutes
Unlimited texts
Contract
12 months
Total cost: £192
Price
£16per month
  • Price becomes £18.50 on 1 April 2026
Get deal
logo
Unlimited speed
5G+

SIM Only Classic

Data
150 GB
(Unlimited speed included)
Allowances
Unlimited minutes
Unlimited texts
Contract
24 months
Total cost: £408
Price
£17per month
  • Price becomes £19.50 on 1 April 2026
  • Price becomes £22 on 1 April 2027
Get deal

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