Thanks for the help, I emailed royalaruba car rental and they replied that yes the cell is free and if I purchase a card for $15, it gives me about 40 minutes to US. That might work since I really only need it in case someone needs to get in touch with me immediately. After that I can even use the phone banks with a card.
However, any better suggestions...please feel free.

Aruba, my home away from home !!