International Calls

International Calls: How do you make them, from your phone or payphone. How much is it ,  to say UK Landline or US mobile,  which is the best network for  international calls and how much do they charge.  Is it possible to get free international calls at any time,  Not using voip to voip(skype),  okay i look forward to your answers.

Also who do you call; business, family, friends,  hotlines   

4 market research,