UE roaming - Cheap Roaming app
If you're going abroad, it would be a good idea to check whether the operator you're planning to connect with does not require to prepare the Cheap Roaming app. The full list of operators, with which we've got a signed contract, can be found here - please pay attention to operators marked with "*". If you see "Yes *", in the "Voice calls and text messages - incoming/outgoing" ("Połączenia głosowe oraz SMS - przychodzące /wychodzące") section, near an operator, it means that this operator requires the activation of the Cheap Roaming app for the proper provision of services.
On the other hand, the activation of the Cheap Roaming app within the Euro Zone shall not cause the prices to be reduced, they shall remain the same. Cheap Roaming reduces the prices only when used outside of the Euro Zone.