I have to ask, since we are talking phones:

We will be there for a week in the near future. Have a iPhone which I need to keep in touch with my business and maybe to use gps maps on the island and the occasional phone call.

I have zero experience with how to use phones and get sims cards and the such. Isn't it just easier to call my company, Verizon, and say I need the phone internationally? What is the benefit of getting sim cards and such? Is it a cheaper option for longer term phone use?