Talkster is ad-supported so you listen to a 10-second audio ad then can talk as long as you like (no talk time limits) all over the globe. So go ahead and give it a whirl. Now you can be making completely free long distance, international, and group conference calls from your iPhone, to any other phone, on any network. Your cost is just for the local phone call.

How it works: You visit the site from your iPhone and enter Your name and your phone number, and for the person you want to call. You then get a local phone number sent to you via SMS. You call that number and you will be connected to your friend’s phone. You have 10 seconds to talk to them and they have to call you back on the number they got in the text message sent to them from Talkster. Try with TestiPhone