If you want to use Mobile Call (or "our service") with Call-by-Call, follow these steps:

You dial 1025 plus the numbers you wish to call (including prefix).

Examples:

• You dial: 1025 01 2795607.
• You want to call the number 0049 121 111 222 in Germany,
  You dial: 1025 0049 121 111 222.
• You want to call the mobile-number: 0699 11223344,
  You dial: 1025 0699 11223344.