In order to call land-lines in Germany from your AT&T cell-phone, you will be charged $1.49/minute at a pay per use rate. If you add AT&T World Connect to your line for an additional $5 a month, the cost per minute goes down to $0.09 per minute.
I have an International $20.00 prepaid phone card will use. It is easy to use and is only 3.6 cent/minute.
I also have choices to use to any country I wish to call. I have used it for years and like it. I can add more more funds to it as I wish and am always in control while using it. But thank you for your response. This card is easy avilable.