Some companies want to offer some phone-paid services, because there are some people who are interested in getting some particular services by calling particular phone numbers. Nowadays this phenomenon becomes more and more popular. It is something really comfortable for many people, the only thing they need to do is to call a number and then they receive what they want to get. Obviously these people are aware of the fact that such calls are more expensive than ordinary calls, but they are really satisfied how quick such service is. They appreciate the fact that they don^t need to go out home in order to receive such service. These phone-paid services are offered at so-called premium rate telephone numbers. These numbers often begin with some particular prefixes which are generally known by people. The situation appears to be clear, everyone knows that when he or she calls a number beginning with particular prefix, the service will cost more than ordinary call. These prefixes are different in each country. Actually premium rate telephone numbers are popular services all over the world. It can be observed that there are more and more companies which offers some phone-paid services, because they know that there are lots of people who want to make use of them.