Depends on where you are @Flojo19 and what tariff you are on.
Some deals now include calls made/received abroad, while others will need a bolt on.
Here is a guide from community advice:
Guide: O2 Contract with O2 Travel Inclusive (75 Free Countries) and (33 x £4.99 per day Countries)
Guide: Your guide on how to use O2 Travel
Please note, this is not customer services and we cannot access your account. Do not publish personal details (email, phone number, bank account).
Link to our guide on how to contact them can be found here
