More and more people are using their mobile phones almost exclusively. Some people no longer have a fixed line at all. As an alternative or supplement to a chargeable 0900 number, which is often considerably expensive for the mobile phone user, a mobile speed dial number (five or six digits) can be used. This allows mobile phone callers to use the services offered at the same prices as fixed-line callers. Premium Voice service numbers can be reached throughout Germany from the mobile network.