as technology advances the cost of carrying a call could in theory reduce, however, we are reaching a level where the consumer is becoming happy with the cost of calls, so these call costs are levelled out.. Years ago 5p per minute anytime to any network would have been unheard of, but its quite common now and people accept it. Obviously I'd like to see these costs reduce, lets just wait and see of they do! At the moment though I'm happy to have 500 x-net minutes for 25 quid per month