I’ve found that Nobelcom has the best rates for calling Sao Paulo Brazil. They have rates starting at 1.3¢ per minute. Other major cities such as Rio De Janeiro start at 1.2¢ per minutes and Belo Horizonte at 1.3¢ per minute. There’s also a Free 15 Minute Trial for new customers to check them out.
From my research for my friend I found that Nobelcom has the best rates for calling Guatemala. They have rates starting at 5.4¢ per minute which is exceptionally cheap. Put that together with Nobelcom’s excellent customer service and you got yourself a stress free phone card experience.
Here are the best rates to call Mexico with rates starting at 1.3¢ to call Mexico City. To call Mexico overall it cost 1.8¢, find out in my blog where to find them.