Hi Joe and Lewis, thanks for participating in the forum.
I checked on the ICE site and they say they do offer international roaming. ICE customers can use their phones to call other ICE mobile customers. Here is an explanation on their site.
ICE Roaming International ServiceApparently, they are in the process of making reciprocal agreements with other carriers. I saw Cingular in the U.S., here is a list of countries and carriers.
Reciprocal Roaming Agreements ICE Costa RicaRatesThe rates applied to International Roaming service vary between countries. At the time of requesting the service, the local carrier will inform the client about its current rates according to destination.
RequirementsMobile customers visiting Costa Rica and attempting to do roaming must make a prior contact with their cellular provider at home in order to obtain roaming service information and its activation.