Yes but you need wifi to use it as well (it's good for calling or texting St. Maarten numbers that would otherwise cost money). But when calling back to the states, when using wifi calling it uses your regular phone number and you don't have to worry about using whatsapp. People in the states can also call or text your regular phone number for free. Again, this only works when you are connected to wifi but I assume you will have it where you are staying and many restaurants and businesses on St. Maarten now have/offer it.