I can only say that all of the people looking to use voip should do as I have done. Get a Pennytel sim, add a Pennytel voip account and make all of your calls through your mobile at the same rate as you do using the Pennytel voip system,. The Pennytel sim is somehow connected to your voip account and when you use the smart dial service the call initially to the smart dial numbers is free and then it is directed to a landile for 8 cents untimed or to an Australian mobile for 10.5 cents per minute timed per second. It cant get any better that that. If you look at the web site (
www.pennytel.com.au) you will see that it also includes International call to over seventy countries and PT sim to any PT sim is always free.