"Basic" Wi-Fi is available for free throughout the resort. This is suitable for checking email and social media.
Hi Speed internet access is available for additional fees up to $15 dollars per day or $90 for the week.
Check with your carrier to confirm that service is available on the island. Also confirm roaming charnges. You may wish to put your phone on Wi-Fi only while on the resort as roaming charges can include a daily fee from the carriers on the island in additio to your service which can be very costly.
A good service to get while traveling is Magic Jack as you can make free internet phone calls wherever you have Wi-Fi