It is also important to note that the sold minutes are charged to the minute, what increases the real price of the cost of the minute for the customer.
If you make 100 calls towards French motives (EUR 0.05 / min) with smartvoip and if you fall on the vocal messaging, every call(appeal) will make 3 seconds.
The charged amount will be of EUR 5.-, while the total duration of the communications is only of 300 seconds (5 minutes). What makes an amount of EUR 1.-/min.
It is of course an extreme example there. By using the products of Betamax, you are certain to realize substantial savings on your costs of telephony.