international Calling within Costa Rica

I have the Simple Global Plan which covers free text, data, and $.25 per minute calling from Costa Rica to U.S.  However, can someone confirm that I can make domestic calls for $.25 per minute I.e., calls within Costa Rica while travelling there?  I don't want to be surprised when returning that these calls made while travelling to local Costa Rican land lines are $3.00 a minute. Gracias.