I posted earlier in this thread about my SFO->EZE->AEP->IGR trip in one day. We are arriving at EZE around 9:30am and depart AEP around 1pm. We will hire a remise to take us from EZE to AEP.

My questions today relate to prepaid mobile services in Argentina. We would like to purchase a prepaid SIM between the time we arrive in EZE and fly out of AEP. What mobile phone carrier(s) have the best prepaid plans for international long distance (to the US), and where (between EZE and AEP) should we purchase it? We must get coverage in Iguazu Falls. Coverage in El Calafate is preferred, but not required.