The Group Card is a prepaid card with the advantageous Program Four:
Via My Vodafone in the Services - Calls section under Four Favorites Program.
Calls from abroad to phone numbers in the Program Four will be charged the same as if you were calling any other number. This means that the price of 1.90 CZK/min. does not apply to these calls, but you will pay according to your roaming tariff and the country you are currently in.