O2 SIM only deals
20 O2 SIM only plans in our comparison, from £7 a month, 4 with unlimited data, 4 on rolling one-month terms. Data, price and contract length on each, with any mid-contract rise stated.
Deals come from our comparison partner and MoneyHQ may earn a commission if you take one.
O2 SIM only plans right now
20 plans, £7 to £38 a month. 4 with unlimited data. 20 on 5G. 4 rolling one-month. 16 state a mid-contract rise.
| Data | A month | Contract | Sold by | Rise |
|---|---|---|---|---|
| 10GB · 5G | £7 | 12 months | O2 | £9.50 from Apr 2027 |
| 50GB · 5G | £8 | 12 months | O2 | £10.50 from Apr 2027 |
| 80GB · 5G | £10 | 12 months | O2 | £12.50 from Apr 2027 |
| 120GB · 5G | £12 | 12 months | O2 | £14.50 from Apr 2027 |
| 250GB · 5G | £15 | 12 months | O2 | £17.50 from Apr 2027 |
| 3GB · 5G | £18 | 24 months | O2 | £20.50 from Apr 2027, then £23 from Apr 2028 |
| 100GB · 5G | £19.99 | 24 months | O2 | £22.49 from Apr 2027, then £24.99 from Apr 2028 |
| 20GB · 5G | £21 | 24 months | O2 | £23.50 from Apr 2027, then £26 from Apr 2028 |
Figures read from our comparison partner’s feed on 17 September 2026. Prices, allowances and rises are stated by each provider and can change.
O2 SIM only: questions people ask
What is the lowest O2 SIM only price?
On 17 September 2026 the lowest monthly price we saw on O2 was £7 a month for 10GB on 12 months. That deal states a rise: £9.50 from Apr 2027.
How much is unlimited data on O2?
The lowest unlimited-data price we saw on O2 was £23.99 a month on 24 months, one of 4 unlimited plans in the comparison.
Can I get a O2 SIM with no contract?
Yes: 4 of the 20 O2 plans we saw are rolling one-month plans you can leave with a month's notice.
Do O2 SIM only prices rise mid-contract?
16 of the 20 plans state a rise, shown as a pound amount and a date on each deal above. Rolling plans can change price with notice but carry no lock-in.
Are O2 SIM only deals 5G?
20 of the 20 plans we saw are 5G. Your phone must support 5G and you need 5G coverage where you use it.