>>>> " they offer free cells with car rentals"
----- Sounds like using that is the best way to go.
>>>> "gives me free incoming calls"
----- My understanding of that is that on the Aruba end nothing is added to your cell bill. But the person in the States still pays the normal fee for a long distance call. Just give the people back home your cell phone #.
They would first put the long distance direct dial code in, then the country code for Aruba, and then the 7 digit cell phone #.
Someone who has done this please add corrections and the correct codes.