To proceed in a comparison, it is sufficient to select at least one service and complete a talk time field. Try to record the actual elements of your usage so that the comparison will give you more reliable results. In the results exported, you may not view the price as advertised on the pricelist. This is due to a number of factors. For example, concerning the cellular products, the pricelists do not include the mobile subscriber fee. The results exported by the system, will bundle the mobile subscriber fee. The most important factor of possible result differentiation is that the system "sees" the talk times that you record as values of actual use. If you declare, that your communication needs are 1500 minutes per month, the system assumes that you added up the actual talk time on your billing account and it proved to be 1500 minutes.