Before you leave
Using your phone while on holiday is as easy as using it at home.
Roaming activation
You don't have to activate roaming . After your first month with us, we will automatically activate O2 Eurotariff, which is especially beneficial for travelling in Europe.
- you can manage or change your roaming settings and tariff by calling *30
- roaming is activated on prepaid cards right from the start
Conditions for roaming activation
How to call while abroad
- don't forget the international prefix (+420 for calling the Czech Republic)
- with a prepaid card the most common way of calling is to use the international format
Some countries and operators require prepaid card users to call using the code *101*+420 XXX XXX XXX#.
More about calling while abroad
More about calling while abroad - prepaid
Useful numbers
List of international prefixes
Roaming tariffs and rates
For calling, sending SMS and MMS messages, and receiving calls while abroad, you are charged according to your roaming tariff.
- O2 Eurotariff - unrivalled prices for texting in the EU
- O2 Smart Roaming - Receive calls for free, with the lowest calling rates in holiday destinations
Roaming tariffs are valid for O2 tariff and prepaid customers.


