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O2 SIM only deals

We’ve got some fantastic SIM only deals from O2 currently available at Carphone Warehouse.

With an O2 pay monthly SIM, you’ll be able to enjoy all the benefits of being on one of the UK’s most popular networks, plus roam like home in European destinations*.

It’s been rated by Ofcom as no. 1 for customer service for the seventh time in a row.

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* You will be charged for incoming calls if you're using your Equipment abroad outside of our Europe Zone (including the cost of receiving voicemail messages). If you use Services abroad outside of our Europe Zone, it will usually take longer to be billed. It's best to check the cost of using your Equipment abroad outside of our Europe Zone before you travel. Accidental roaming might occur if you are in an area close to national borders because your Equipment picks up a network across the border. If this happens, you may be charged as though you were roaming on an international network. You can prevent this if you are near a national border by setting your Mobile Phone or other Equipment (as applicable) to do a manual network selection and select the 'O2' Network. Click here to find out where you can roam like home in European destinations. For further T&C's click here.


**Full terms and conditions for gifts are available here. Full terms and conditions for the gift cards are available from


***Calls may be recorded and/or monitored. Lines open Monday - Friday 8am - 10pm, Saturday - Sunday 8am - 8pm, Bank holidays 10am - 5pm.