Dienst für kurznachrichten is available as an add-on to US paid plans only and Dienst für kurznachrichten credits are added to your account after purchase. Application and agreement to terms is required before purchasing credits. Credits are issued monthly and unused credits expire and do not roll over. Pricing varies. https://rafaelzozip.tblogz.com/wenig-bekannte-fakten-über-in-app-werbung-42246670