I'm new to this, but have a similar question so thought I should join this thread. Correct me if I'm in the wrong place.
I also am connecting in EZE from JFK on Aerolineas Argentina. I am changing planes at EZE to go on to Calafate also on AR. I am meeting someone in EZE who will be joining me on the Calafate connection.
As I am unfamiliar with EZE and am traveling on an airline known for its delays I have several questions about connecting:

I as I understand it, the arrivals and departures are in different terminals, are they close by?
Will I have to go through immigration in BA or in Calafate?
Do cell phones work in this airport?

Thanks for your help.