Plenty of hotels, bars and shops offer free wireless where you can maybe bring down a laptop or an iPad to use skype , I-call or some other communications tool of your choice to call home for free over the internet.
With Cell Phones make sure to consult with your carriers to find out about international fees are for calls and texting.
There are also many free Wi-Fi Hotpots in Aruba so you will be able to stay connected on your vacation.
One useful location is the Cafe Costa Linda in Oranjestad
For more Wi-Fi locations
we found this website very handy: http://www.openwifispots.com/