Our Best SIM Only Deals

Save money with a sim only plan

Phones Tablets Mobile broadband

Find your perfect Pay Monthly SIM

Happy with your phone? Save money with a Pay Monthly SIM. You can even keep your number if you've joined from another network. Browse our best SIM only deals today, and choose a 30 day, 12 month or 24 month contract.

Roam freely. We're the only major network that is not reintroducing EU roaming charges. Up to 25GB.
Contract length
Featured

Sort by
O2 recommends

Filter by
0 filters applied

150GB Plus

Unlimited UK Minutes
Unlimited UK Texts

24 Month

Offers included

Claim a £100 digital prepaid Mastercard®**. Ends 6 March.

Roam at no extra cost in 75 destinations worldwide, including the EU, the USA, Australia and Mexico.

Get up to 6 months’ free Apple Music.

Choose 6 months of Disney+, Amazon Prime, or more.

Option to upgrade to a new phone and plan after three months.

30GB Plus

Unlimited UK Minutes
Unlimited UK Texts

24 Month

Offers included

Get 30GB for £20.99*, for 24 months.

Roam at no extra cost in 75 destinations worldwide, including the EU, the USA, Australia and Mexico.

Get up to 6 months’ free Apple Music.

Choose 6 months of Disney+, Amazon Prime, or more.

Option to upgrade to a new phone and plan after three months.

Unlimited Plus

Unlimited UK Minutes
Unlimited UK Texts

24 Month

Offers included

Claim a £150 digital prepaid Mastercard®**. Ends 6 March.

Roam at no extra cost in 75 destinations worldwide, including the EU, the USA, Australia and Mexico.

Get up to 6 months’ free Apple Music.

Choose 6 months of Disney+, Amazon Prime, or more.

Option to upgrade to a new phone and plan after three months.

250GB

Unlimited UK Minutes
Unlimited UK Texts

24 Month

Offers included

Get 250GB for £26*, for 24 months.

Roam freely in the EU. Only on O2. Up to 25GB.

Get up to 3 months’ free Apple Music.

Choose 3 months of Disney+, Amazon Prime, or more.

Option to upgrade to a new phone and plan after three months.

View all results

*Monthly price of your Airtime Plan will increase each April from April 2025 by the Retail Price Index rate of inflation announced in February each year plus 3.9%. If RPI is negative, we'll only apply the 3.9%. See o2.co.uk/prices.