I have a mobile which I had bought from Germany in 2023. I am going again to Germany this week and wanted to use the same connection. I tried to charge 5 Euro and got the message that it charged. But I got one more message that "We are unable to rebook your base price of 14.99 Euro." What does this means? I wanted to have Subscription option 4 GB for 9.99 euros / Code: "Abo 4 GB". So If I need to have this, in total I need to have 14.99 + 9.99 Euro? kindly guide.
