Does anyone remember The Lurker's post back in March about using wifi calling on your smartphone? I'm planning to test that here at home sometime this week. I just tried searching for the thread but couldn't locate it; thankfully, I printed it out at the time. However, he opined that using wifi calling on your smartphone results in not needing a local phone.
And yes, I have a phone I purchased from Sharon when she closed shop.
My daughter is an AUC med student and she uses wifi calling all the time to call and or text us and her friends on Island who also have US phones, but as Carol said when you have no wifi it will not work and calling a St Maarten number is international, the same as if they call you.
